The paper has now been accepted for publication in MNRAS. See the full press release or just head over to the simulation movie made by co-Author Dr. Matthew Liska.

• press release text
• paper on arXiv
• simulation movie on YouTube

The picture of our very own black hole is finally out. Glad to have played a small role in its interpretation in the BlackHoleCam and EventHorizonTelescope collaborations. See here for all the 10(!!) papers. But if you are in a hurry check out paper V which shows the large role of computational physics in today's discovery.

I'm happy to announce that our paper led by NOVA VIA Postdoc Hector Olivares was just featured on science alert.

In the study, we conducted GRMHD simulations of accretion onto condensations of light bosons called Boson stars. While Boson stars show little interaction with ordinary matter except for their gravitational pull, they do bend the light similar to a black hole. We find that, depending on the compactness (the ratio of mass to radius), some Boson stars also give rise to empty interiors, mimicking the shadow observed by the EHT. In our models however, the shadow turned out too small to account for the EHT observations of M87.

See the MNRAS paper for all the details!

Update: for a nice summary, see the following YouTube video by Anton Petrov.

With great please I can finally announce the release of BHAC v1.0 under the GPL3 license! You can find usage instructions and updated documentation at our new website bhac.science.

I'm really looking forward to the science coming out of the public code!

Alberto has stared his master project in September 2019. He investigates formation and properties of mixed-type supernova remnants using numerical simulations of stellar winds and supernovae explosions.

Alberto is jointly supervised with Dr. Jacco Vink.

Gibwa has started her postdoc in the NOVA Virtual Institute for Accretion (VIA) in July 2019. She focuses on spectral timing properties of black-hole X-ray binaries from GRMHD simulations.

Pushpita has started her PhD in September 2019. She studies dynamics and X-ray emission in accreting Pulsars with the aim to improve mass-radius measurements performed for example with the NICER satellite.

Pushpita is jointly supervised with Prof. Anna Watts

Sebastiaan has started his PhD project in June 2019. He investigates routes to fast dissipation in relativistic flows leading to rapid particle acceleration and flares. For this purpose he performs simulations of relativistic reconnection and instability development in jets.

Here you find the planning calendar for the API colloquia. After having been three years on the wheel, I'm happy that Antonia Oklopčić has now taken over the organization. Please direct questions regarding schedule and invitations to her.

For the official announcements, see the API website.

We know about relativistic astrophysical sources through the radiation they emit. In cases of jets, pulsars and their nebula, the radiation is emitted by particles in a non-thermal distribution making these objects shine throughout the entire electromagnetic spectrum.

My interest in modeling radiation from such astrophysical sources is two-fold: on the one hand, it lets us extract important source parameters like the speed of the flow or its energy; on the other hand, the mechanisms transferring energy to the radiating particles are rich in physics themselves -- and often poorly understood!

Magnetic Reconnection

Currently, the most promising mechanism to explain rapid flares and plasma heating in astrophysical sources is magnetic reconnection. In this process, the magnetic energy is dissipated by topologically re-arranging the magnetic field via current sheets. The non-linear dynamics and effective dissipation of magnetic reconnection is subject to much speculation as its study requires an understanding of the formation of the current sheet (e.g. through turbulent processes) as well as a description of the microphysical parameters in the current sheet itself.

With collaborators, we have recently shown how plasma turbulence in a black hole accretion flow leads to copious magnetic reconnection along with magnetic islands.

Current density in a black hole accretion simulation showing formation of current sheets and reconnection. From Nathanail et al. (2020).

Sometimes, reconnection occurs in the highly magnetised regions above the black hole. Then plasmoids trapping emitting particles can be flung out as an episodic relativistic outflow. See the paper led by Dr. Antonios Nathanail for details.

Plasma density of a relativistic reconnection simulation with anti-parallel magnetic fields showing a plasmoid chain.

In his first thesis project, Sebastiaan investigates the reconnection process both from the fluid scale and from the microphysical kinetic scales with the aim to understand how reconnection proceeds and energizes particles in astrophysical sources.

Multi-frequency image of the Crab Pulsar Wind Nebula by the Hubble, Chandra and Spitzer space telescopes. Credit: NASA, ESA, CXC, JPL-Caltech, J. Hester and A. Loll (Arizona State Univ.), R. Gehrz (Univ. Minn.), and STScI

Once a massive star has had its final showdown in a super-nova explosion, it leaves behind an extremely dense remnant: matter is packed so tight as if it was forming a single atomic nucleus. Given enough mass of the compact remnant (around two solar masses), it can even collapse further to form a black hole.
Neutron stars (the remnants which don't become black holes) are particularly interesting astrophysical objects: they are stabilized against ultimate gravitational collapse by the strong nuclear force. Thus studying their structure, we can learn about the fundamental physics of matter at extreme densities. Many rapidly spinning neutron stars (performing up to a thousand turns every second) are endowed with strong magnetic field and emit pulses of electromagnetic radiation with every one of their turns. These are called Pulsars.

Not only do Pulsars emit regular bursts of electromagnetic radiation, their rotating magnetosphere also drives a relativistic outflow of electrons and positrons, called a Pulsar Wind. Similar to the solar wind, the Pulsar Wind is accelerated by the electromagnetic field, but since its density is so low, it reaches highly relativistic speeds (some models predict Lorentz factors of 10⁵, much faster than any other outflow in the Universe). Once this outflow has expanded for around nine orders of magnitude, its dynamic pressure drops below the pressure of the supernova ejecta and a shock forms -- the wind termination shock. At this shock, the particles of the wind are accelerated and non-thermal radiation illuminates the stellar ejecta from the inside out: a Pulsar Wind Nebula is born.

The most celebrated Pulsar Wind Nebula is the Crab Nebula at a distance of 2000 pc. High resolution optical and X-ray observations have revealed the intricate dynamics of the termination shock: the emergence of a 'jet and torus' morphology, emission of wisp-like perturbations in the flow and the appearance of a 'knot' of emission attached to the shock are only a few of the variable features.

3D simulation of the flow in the PWN showing magnetic field strength (left) and the total pressure in the nebula (right), formation of current sheets, turbulence and dissipation in the nebula dramatically alter the dynamics of the flow. See Three-dimensional magnetohydrodynamic simulations of the Crab nebula for further info.

Pulsar Wind Nebulae are ideal laboratories for relativistic plasma dynamics and their modeling is connected to many questions of astro- and fundamental- physics, for example:

• How does non-thermal particle acceleration take place? How does the particle spectrum evolve in the nebula?
• How is magnetic energy transported to relativistic particles? How does turbulent magnetic dissipation operate?
• What is the origin of gamma-ray flares within the Crab nebula?
• What is the origin of radio-emitting electrons? And how many particles can be supplied by the neutron star magnetosphere?
• How many leptons escape into the ISM and find their way to Earth? Can PWN explain the observed positron excess compared to cosmological predictions?

By studying accretion and outflows from compact objects, we learn about the most efficient energy source in the universe. I'm particularly interested in the formation, collimation and ultimately dissipation of relativistic jets which emanate from the direct vicinity of black holes across all mass ranges.

One of the most exciting observations in this field was the recent imaging of the black hole in the galaxy M87. Using Very Long Baseline Interferometry (VLBI) of high-frequency radio telescopes scattered across the globe, the Event Horizon Telescope Collaboration took this image.

Image credit: EHTC, CC BY-ND 4.0

Numerical simulations of turbulent accretion (with bhac among other codes) were combined with general relativistic ray-tracing to interpret the structure seen on the image: we witness the light emitted from hot plasma on its final orbits before plunging into the black hole. The dark region in the center is the so-called black hole shadow, a gravitationally lensed projection of the unstable photon orbit. Within the shadow area all light vanishes within the event horizon.

The galaxy M87 is also famous for its remarkable relativistic jet which is one of the best studied in astrophysics. Using high resolution 3D adaptive mesh refinement simulations with bhac, we have modeled the launching of the jet with unprecedented accuracy. Modeling the electrons within a kappa-distribution, we find that non-thermal particles are crucial to extend the spectrum beyond the radio band.

Relativistic ray-traced images of the simulated jet at three different radio frequencies: 43GHz (left), 86GHz (middle) and the EHT frequency of 230GHz (right). See the paper led by Jordy Davelaar for details.

It will be glorious, stay tuned!

Ugh, since I'm working with some old setup, have to use html5 with some basic php, so no fancy content management here. Trying to make it look fancy anyways...

A reasonably up-to-date CV can be found here as pdf.

• 1. Selvi, S., Porth, O., Ripperda, B., Bacchini, F., Sironi, L., Keppens, R.; (Jun 2023). Effective Resistivity in Relativistic Collisionless Reconnection, The Astrophysical Journal, Volume 950, Issue 2, id.169, 9 pp.
• 2. Prather, Ben S., Dexter, Jason, Moscibrodzka, Monika, Pu, Hung-Yi, Bronzwaer, Thomas, Davelaar, Jordy, Younsi, Ziri, Gammie, Charles F., Gold, Roman, Wong, George N. et al.; (Jun 2023). Comparison of Polarized Radiative Transfer Codes Used by the EHT Collaboration, The Astrophysical Journal, Volume 950, Issue 1, id.35, 23 pp.
• 3. Liska, M. T. P., Kaaz, N., Musoke, G., Tchekhovskoy, A., Porth, O.; (Feb 2023). Radiation Transport Two-temperature GRMHD Simulations of Warped Accretion Disks, The Astrophysical Journal Letters, Volume 944, Issue 2, id.L48, 14 pp.
• 4. Jorstad, Svetlana, Wielgus, Maciek, Lico, Rocco, Issaoun, Sara, Broderick, Avery E., Pesce, Dominic W., Liu, Jun, Zhao, Guang-Yao, Krichbaum, Thomas P., Blackburn, Lindy et al.; (Feb 2023). The Event Horizon Telescope Image of the Quasar NRAO 530, The Astrophysical Journal, Volume 943, Issue 2, id.170, 19 pp.
• 5. Olivares S., Hector R., Moscibrodzka, Monika A., Porth, Oliver; (Jan 2023). General relativistic hydrodynamic simulations of perturbed transonic accretion, eprint arXiv:2301.12020
• 6. Musoke, G., Liska, M., Porth, O., van der Klis, Michiel, Ingram, Adam; (Jan 2023). Disc tearing leads to low and high frequency quasi-periodic oscillations in a GRMHD simulation of a thin accretion disc, Monthly Notices of the Royal Astronomical Society, Volume 518, Issue 2, pp.1656-1671
• 7. Kaaz, Nicholas, Liska, Matthew T. P., Jacquemin-Ide, Jonatan, Andalman, Zachary L., Musoke, Gibwa, Tchekhovskoy, Alexander, Porth, Oliver; (Oct 2022). Nozzle Shocks, Disk Tearing and Streamers Drive Rapid Accretion in 3D GRMHD Simulations of Warped Thin Disks, eprint arXiv:2210.10053
• 8. Das, Pushpita, Porth, Oliver, Watts, Anna L.; (Sep 2022). GRMHD simulations of accreting neutron stars with non-dipole fields, Monthly Notices of the Royal Astronomical Society, Volume 515, Issue 3, pp.3144-3161
• 9. Liska, M. T. P., Musoke, G., Tchekhovskoy, A., Porth, O., Beloborodov, A. M.; (Aug 2022). Formation of Magnetically Truncated Accretion Disks in 3D Radiation-transport Two-temperature GRMHD Simulations, The Astrophysical Journal Letters, Volume 935, Issue 1, id.L1, 12 pp.
• 10. Issaoun, Sara, Wielgus, Maciek, Jorstad, Svetlana, Krichbaum, Thomas P., Blackburn, Lindy, Janssen, Michael, Chan, Chi-kwan, Pesce, Dominic W., Gómez, José L., Akiyama, Kazunori et al.; (Aug 2022). Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope, The Astrophysical Journal, Volume 934, Issue 2, id.145, 21 pp.
• 11. das, Pushpita, Porth, Oliver, Watts, Anna; (Jul 2022). Simulating accreting neutron stars with dipolar and complex magnetic fields, 44th COSPAR Scientific Assembly. Held 16-24 July, 2022. Online at https://www.cosparathens2022.org/. Abstract E1.8-0031-22.
• 12. Musoke, Gibwa, Porth, Oliver, Liska, Matthew; (Jul 2022). Magnetic Flux and Angular Momentum Transport in GRMHD and Radiative GRMHD Simulations of Truncated Accretion Disks, 44th COSPAR Scientific Assembly. Held 16-24 July, 2022. Online at https://www.cosparathens2022.org/. Abstract E1.1-0022-22.
• 13. Selvi, Sebastiaan, Ripperda, Bart, Bacchini, Fabio, Sironi, Lorenzo, Porth, Oliver; (Jul 2022). On the microphysics of resistivity in relativistic flows, 44th COSPAR Scientific Assembly. Held 16-24 July, 2022. Online at https://www.cosparathens2022.org/. Abstract D2.4-0004-22.
• 14. Porth, Oliver, Porth, Oliver; (Jul 2022). Formation and dynamics of turbulent current sheets in pulsar wind nebulae, 44th COSPAR Scientific Assembly. Held 16-24 July, 2022. Online at https://www.cosparathens2022.org/. Abstract D2.4-0002-22.
• 15. Nathanail, Antonios, Mpisketzis, Vasilis, Porth, Oliver, Fromm, Christian M., Rezzolla, Luciano; (Jul 2022). Magnetic reconnection and plasmoid formation in three-dimensional accretion flows around black holes, Monthly Notices of the Royal Astronomical Society, Volume 513, Issue 3, pp.4267-4277
• 16. Broderick, Avery E., Gold, Roman, Georgiev, Boris, Pesce, Dominic W., Tiede, Paul, Ni, Chunchong, Moriyama, Kotaro, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter et al.; (May 2022). Characterizing and Mitigating Intraday Variability: Reconstructing Source Structure in Accreting Black Holes with mm-VLBI, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L21, 30 pp.
• 17. Georgiev, Boris, Pesce, Dominic W., Broderick, Avery E., Wong, George N., Dhruv, Vedant, Wielgus, Maciek, Gammie, Charles F., Chan, Chi-kwan, Chatterjee, Koushik, Emami, Razieh et al.; (May 2022). A Universal Power-law Prescription for Variability from Synthetic Images of Black Hole Accretion Flows, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L20, 32 pp.
• 18. Wielgus, Maciek, Marchili, Nicola, Martí-Vidal, Iván, Keating, Garrett K., Ramakrishnan, Venkatessh, Tiede, Paul, Fomalont, Ed, Issaoun, Sara, Neilsen, Joey, Nowak, Michael A. et al.; (May 2022). Millimeter Light Curves of Sagittarius A* Observed during the 2017 Event Horizon Telescope Campaign, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L19, 32 pp.
• 19. Farah, Joseph, Galison, Peter, Akiyama, Kazunori, Bouman, Katherine L., Bower, Geoffrey C., Chael, Andrew, Fuentes, Antonio, Gómez, José L., Honma, Mareki, Johnson, Michael D. et al.; (May 2022). Selective Dynamical Imaging of Interferometric Data, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L18, 21 pp.
• 20. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlos, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Bach, Uwe, Baczko, Anne-Kathrin et al.; (May 2022). First Sagittarius A* Event Horizon Telescope Results. VI. Testing the Black Hole Metric, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L17, 44 pp.
• 21. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlos, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Bach, Uwe, Baczko, Anne-Kathrin et al.; (May 2022). First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L16, 49 pp.
• 22. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlos, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Bach, Uwe, Baczko, Anne-Kathrin et al.; (May 2022). First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L15, 52 pp.
• 23. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlos, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Bach, Uwe, Baczko, Anne-Kathrin et al.; (May 2022). First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L14, 64 pp.
• 24. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlos, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Bach, Uwe, Baczko, Anne-Kathrin et al.; (May 2022). First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multiwavelength Observations, Data Processing, and Calibration, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L13, 31 pp.
• 25. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlos, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Bach, Uwe, Baczko, Anne-Kathrin et al.; (May 2022). First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way, The Astrophysical Journal Letters, Volume 930, Issue 2, id.L12, 21 pp.
• 26. Fromm, Christian M., Cruz-Osorio, Alejandro, Mizuno, Yosuke, Nathanail, Antonios, Younsi, Ziri, Porth, Oliver, Olivares, Hector, Davelaar, Jordy, Falcke, Heino, Kramer, Michael et al.; (Apr 2022). Impact of non-thermal particles on the spectral and structural properties of M87, Astronomy & Astrophysics, Volume 660, id.A107, 22 pp.
• 27. Cruz-Osorio, Alejandro, Fromm, Christian M., Mizuno, Yosuke, Nathanail, Antonios, Younsi, Ziri, Porth, Oliver, Davelaar, Jordy, Falcke, Heino, Kramer, Michael, Rezzolla, Luciano; (Jan 2022). State-of-the-art energetic and morphological modelling of the launching site of the M87 jet, Nature Astronomy, Volume 6, p. 103-108
• 28. Satapathy, Kaushik, Psaltis, Dimitrios, Özel, Feryal, Medeiros, Lia, Dougall, Sean T., Chan, Chi-Kwan, Wielgus, Maciek, Prather, Ben S., Wong, George N., Gammie, Charles F. et al.; (Jan 2022). The Variability of the Black Hole Image in M87 at the Dynamical Timescale, The Astrophysical Journal, Volume 925, Issue 1, id.13, 19 pp.
• 29. Cielo, S., Porth, O., Iapichino, L., Karmakar, A., Olivares, H., Xia, C.; (Jan 2022). Optimizing the hybrid parallelization of BHAC, Astronomy and Computing, Volume 38, article id. 100509.
• 30. Mizuno, Yosuke, Fromm, Christian M., Younsi, Ziri, Porth, Oliver, Olivares, Hector, Rezzolla, Luciano; (Sep 2021). Comparison of the ion-to-electron temperature ratio prescription: GRMHD simulations with electron thermodynamics, Monthly Notices of the Royal Astronomical Society, Volume 506, Issue 1, pp.741-758
• 31. Janssen, Michael, Falcke, Heino, Kadler, Matthias, Ros, Eduardo, Wielgus, Maciek, Akiyama, Kazunori, Baloković, Mislav, Blackburn, Lindy, Bouman, Katherine L., Chael, Andrew et al.; (Jul 2021). Event Horizon Telescope observations of the jet launching and collimation in Centaurus A, Nature Astronomy, Volume 5, p. 1017-1028
• 32. Mizuno, Y., Younsi, Z., Fromm, C. M., Porth, O., De Laurentis, M., Olivares, H., Falcke, H., Kramer, M., Rezzolla, L.; (Jul 2021). Testing Theories of Gravity via Black Hole Shadows in Sgr A*, New Horizons in Galactic Center Astronomy and Beyond. ASP Conference Series, Vol. 528, Proceedings of a workshop held 21-24 October 2019 at Keio University, Yokohama, Japan. Edited by Masato Tsuboi and Tomoharu Oka. San Francisco: Astronomical Society of the Pacific, 2021, p.255
• 33. Komissarov, Serguei, Porth, Oliver; (Jun 2021). Numerical simulations of jets, New Astronomy Reviews, Volume 92, article id. 101610.
• 34. Kocherlakota, Prashant, Rezzolla, Luciano, Falcke, Heino, Fromm, Christian M., Kramer, Michael, Mizuno, Yosuke, Nathanail, Antonios, Olivares, Héctor, Younsi, Ziri, Akiyama, Kazunori et al.; (May 2021). Constraints on black-hole charges with the 2017 EHT observations of M87*, Physical Review D, Volume 103, Issue 10, article id.104047
• 35. Narayan, Ramesh, Palumbo, Daniel C. M., Johnson, Michael D., Gelles, Zachary, Himwich, Elizabeth, Chang, Dominic O., Ricarte, Angelo, Dexter, Jason, Gammie, Charles F., Chael, Andrew A. et al.; (May 2021). The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole, The Astrophysical Journal, Volume 912, Issue 1, id.35, 26 pp.
• 36. Fromm, C. M., Mizuno, Y., Younsi, Z., Olivares, H., Porth, O., De Laurentis, M., Falcke, H., Kramer, M., Rezzolla, L.; (May 2021). Using space-VLBI to probe gravity around Sgr A^*, Astronomy & Astrophysics, Volume 649, id.A116, 15 pp.
• 37. Porth, O., Mizuno, Y., Younsi, Z., Fromm, C. M.; (Apr 2021). Flares in the Galactic Centre - I. Orbiting flux tubes in magnetically arrested black hole accretion discs, Monthly Notices of the Royal Astronomical Society, Volume 502, Issue 2, pp.2023-2032
• 38. Nathanail, Antonios, Gill, Ramandeep, Porth, Oliver, Fromm, Christian M., Rezzolla, Luciano; (Apr 2021). 3D magnetized jet break-out from neutron-star binary merger ejecta: afterglow emission from the jet and the ejecta, Monthly Notices of the Royal Astronomical Society, Volume 502, Issue 2, pp.1843-1855
• 39. EHT MWL Science Working Group, Algaba, J. C., Anczarski, J., Asada, K., Baloković, M., Chandra, S., Cui, Y. -Z., Falcone, A. D., Giroletti, M., Goddi, C. et al.; (Apr 2021). Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign, The Astrophysical Journal Letters, Volume 911, Issue 1, id.L11, 43 pp.
• 40. Goddi, Ciriaco, Martí-Vidal, Iván, Messias, Hugo, Bower, Geoffrey C., Broderick, Avery E., Dexter, Jason, Marrone, Daniel P., Moscibrodzka, Monika, Nagai, Hiroshi, Algaba, Juan Carlos et al.; (Mar 2021). Polarimetric Properties of Event Horizon Telescope Targets from ALMA, The Astrophysical Journal Letters, Volume 910, Issue 1, id.L14, 54 pp.
• 41. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Algaba, Juan Carlos, Alberdi, Antxon, Alef, Walter, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David et al.; (Mar 2021). First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon, The Astrophysical Journal Letters, Volume 910, Issue 1, id.L13, 43 pp.
• 42. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Algaba, Juan Carlos, Alberdi, Antxon, Alef, Walter, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David et al.; (Mar 2021). First M87 Event Horizon Telescope Results. VII. Polarization of the Ring, The Astrophysical Journal Letters, Volume 910, Issue 1, id.L12, 48 pp.
• 43. Walg, S., Achterberg, A., Markoff, S., Keppens, R., Porth, O.; (Sep 2020). Relativistic AGN jets - III. Synthesis of synchrotron emission from double-double radio galaxies, Monthly Notices of the Royal Astronomical Society, Volume 497, Issue 3, pp.3638-3657
• 44. Olivares, Hector, Younsi, Ziri, Fromm, Christian M., De Laurentis, Mariafelicia, Porth, Oliver, Mizuno, Yosuke, Falcke, Heino, Kramer, Michael, Rezzolla, Luciano; (Sep 2020). How to tell an accreting boson star from a black hole, Monthly Notices of the Royal Astronomical Society, Volume 497, Issue 1, pp.521-535
• 45. Wielgus, Maciek, Akiyama, Kazunori, Blackburn, Lindy, Chan, Chi-kwan, Dexter, Jason, Doeleman, Sheperd S., Fish, Vincent L., Issaoun, Sara, Johnson, Michael D., Krichbaum, Thomas P. et al.; (Sep 2020). Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope, The Astrophysical Journal, Volume 901, Issue 1, id.67, 28 pp.
• 46. Kim, Jae-Young, Krichbaum, Thomas P., Broderick, Avery E., Wielgus, Maciek, Blackburn, Lindy, Gómez, José L., Johnson, Michael D., Bouman, Katherine L., Chael, Andrew, Akiyama, Kazunori et al.; (Aug 2020). Event Horizon Telescope imaging of the archetypal blazar 3C 279 at an extreme 20 microarcsecond resolution, Astronomy & Astrophysics, Volume 640, id.A69, 21 pp.
• 47. Nathanail, Antonios, Gill, Ramandeep, Porth, Oliver, Fromm, Christian M., Rezzolla, Luciano; (Jul 2020). On the opening angle of magnetized jets from neutron-star mergers: the case of GRB170817A, Monthly Notices of the Royal Astronomical Society, Volume 495, Issue 4, pp.3780-3787
• 48. Gold, Roman, Broderick, Avery E., Younsi, Ziri, Fromm, Christian M., Gammie, Charles F., Mościbrodzka, Monika, Pu, Hung-Yi, Bronzwaer, Thomas, Davelaar, Jordy, Dexter, Jason et al.; (Jul 2020). Verification of Radiative Transfer Schemes for the EHT, The Astrophysical Journal, Volume 897, Issue 2, id.148
• 49. Broderick, Avery E., Gold, Roman, Karami, Mansour, Preciado-López, Jorge A., Tiede, Paul, Pu, Hung-Yi, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi et al.; (Jul 2020). THEMIS: A Parameter Estimation Framework for the Event Horizon Telescope, The Astrophysical Journal, Volume 897, Issue 2, id.139
• 50. Nathanail, Antonios, Fromm, Christian M., Porth, Oliver, Olivares, Hector, Younsi, Ziri, Mizuno, Yosuke, Rezzolla, Luciano; (Jun 2020). Plasmoid formation in global GRMHD simulations and AGN flares, Monthly Notices of the Royal Astronomical Society, Volume 495, Issue 2, pp.1549-1565
• 51. Keppens, Rony, Teunissen, Jannis, Xia, Chun, Porth, Oliver; (Apr 2020). MPI-AMRVAC: a parallel, grid-adaptive PDE toolkit, eprint arXiv:2004.03275
• 52. van der Gucht, Jeffrey, Davelaar, Jordy, Hendriks, Luc, Porth, Oliver, Olivares, Hector, Mizuno, Yosuke, Fromm, Christian M., Falcke, Heino; (Apr 2020). Deep Horizon: A machine learning network that recovers accreting black hole parameters, Astronomy & Astrophysics, Volume 636, id.A94, 12 pp.
• 53. Roelofs, F., Janssen, M., Natarajan, I., Deane, R., Davelaar, J., Olivares, H., Porth, O., Paine, S. N., Bouman, K. L., Tilanus, R. P. J. et al.; (Apr 2020). SYMBA: An end-to-end VLBI synthetic data generation pipeline. Simulating Event Horizon Telescope observations of M 87, Astronomy & Astrophysics, Volume 636, id.A5, 19 pp.
• 54. Millas, Dimitrios, Porth, Oliver, Keppens, Rony; (Jan 2020). Simulations of the W50-SS433 system, Perseus in Sicily: From Black Hole to Cluster Outskirts. Proceedings of the International Astronomical Union, Volume 342, pp. 257-259
• 55. Younsi, Ziri, Porth, Oliver, Mizuno, Yosuke, Fromm, Christian M., Olivares, Hector; (Jan 2020). Modelling the polarised emission from black holes on event horizon-scales, Perseus in Sicily: From Black Hole to Cluster Outskirts. Proceedings of the International Astronomical Union, Volume 342, pp. 9-12
• 56. Davelaar, Jordy, Olivares, Hector, Porth, Oliver, Bronzwaer, Thomas, Janssen, Michael, Roelofs, Freek, Mizuno, Yosuke, Fromm, Christian M., Falcke, Heino, Rezzolla, Luciano; (Dec 2019). Modeling non-thermal emission from the jet-launching region of M 87 with adaptive mesh refinement, Astronomy & Astrophysics, Volume 632, id.A2, 16 pp.
• 57. Goddi, C., Crew, G., Impellizzeri, V., Martí-Vidal, I., Matthews, L. D., Messias, H., Rottmann, H., Alef, W., Blackburn, L., Bronzwaer, T. et al.; (Sep 2019). First M87 Event Horizon Telescope Results and the Role of ALMA, The Messenger, vol. 177, p. 25-35
• 58. Ripperda, B., Bacchini, F., Porth, O., Most, E. R., Olivares, H., Nathanail, A., Rezzolla, L., Teunissen, J., Keppens, R.; (Sep 2019). General-relativistic Resistive Magnetohydrodynamics with Robust Primitive-variable Recovery for Accretion Disk Simulations, The Astrophysical Journal Supplement Series, Volume 244, Issue 1, article id. 10, 19 pp. (2019).
• 59. Olivares, Hector, Porth, Oliver, Davelaar, Jordy, Most, Elias R., Fromm, Christian M., Mizuno, Yosuke, Younsi, Ziri, Rezzolla, Luciano; (Sep 2019). Constrained transport and adaptive mesh refinement in the Black Hole Accretion Code, Astronomy & Astrophysics, Volume 629, id.A61, 21 pp.
• 60. Fromm, C. M., Younsi, Z., Baczko, A., Mizuno, Y., Porth, O., Perucho, M., Olivares, H., Nathanail, A., Angelakis, E., Ros, E. et al.; (Sep 2019). Using evolutionary algorithms to model relativistic jets. Application to NGC 1052, Astronomy & Astrophysics, Volume 629, id.A4, 24 pp.
• 61. Porth, Oliver, Chatterjee, Koushik, Narayan, Ramesh, Gammie, Charles F., Mizuno, Yosuke, Anninos, Peter, Baker, John G., Bugli, Matteo, Chan, Chi-kwan, Davelaar, Jordy et al.; (Aug 2019). The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project, The Astrophysical Journal Supplement Series, Volume 243, Issue 2, article id. 26, 40 pp. (2019).
• 62. Ripperda, B., Porth, O., Sironi, L., Keppens, R.; (May 2019). Relativistic resistive magnetohydrodynamic reconnection and plasmoid formation in merging flux tubes, Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 1, p.299-314
• 63. Ripperda, Bart, Porth, Oliver, Keppens, Rony; (May 2019). Test particles in relativistic resistive magnetohydrodynamics, Journal of Physics: Conference Series, Volume 1225, Issue 1, article id. 012018 (2019).
• 64. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John et al.; (Apr 2019). First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole, The Astrophysical Journal Letters, Volume 875, Issue 1, article id. L6, 44 pp. (2019).
• 65. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John et al.; (Apr 2019). First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring, The Astrophysical Journal Letters, Volume 875, Issue 1, article id. L5, 31 pp. (2019).
• 66. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John et al.; (Apr 2019). First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole, The Astrophysical Journal Letters, Volume 875, Issue 1, article id. L4, 52 pp. (2019).
• 67. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John et al.; (Apr 2019). First M87 Event Horizon Telescope Results. III. Data Processing and Calibration, The Astrophysical Journal Letters, Volume 875, Issue 1, article id. L3, 32 pp. (2019).
• 68. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John et al.; (Apr 2019). First M87 Event Horizon Telescope Results. II. Array and Instrumentation, The Astrophysical Journal Letters, Volume 875, Issue 1, article id. L2, 28 pp. (2019).
• 69. Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John et al.; (Apr 2019). First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole, The Astrophysical Journal Letters, Volume 875, Issue 1, article id. L1, 17 pp. (2019).
• 70. Bacchini, F., Ripperda, B., Porth, O., Sironi, L.; (Feb 2019). Generalized, Energy-conserving Numerical Simulations of Particles in General Relativity. II. Test Particles in Electromagnetic Fields and GRMHD, The Astrophysical Journal Supplement Series, Volume 240, Issue 2, article id. 40, 25 pp. (2019).
• 71. Nathanail, Antonios, Porth, Oliver, Rezzolla, Luciano; (Jan 2019). Magnetically Inspired Explosive Outflows from Neutron-star Mergers, The Astrophysical Journal Letters, Volume 870, Issue 2, article id. L20, 6 pp. (2019).
• 72. Millas, Dimitrios, Porth, Oliver, Keppens, Rony; (Jan 2019). Relativistic 3D Hydrodynamic Simulations of the W50-SS433 System, JET Simulations, Experiments, and Theory, Astrophysics and Space Science Proceedings, Volume 55. ISBN 978-3-030-14127-1. Springer Nature Switzerland AG, 2019, p. 71
• 73. De Laurentis, Mariafelicia, Younsi, Ziri, Porth, Oliver, Mizuno, Yosuke, Rezzolla, Luciano; (May 2018). Test-particle dynamics in general spherically symmetric black hole spacetimes, Physical Review D, Volume 97, Issue 10, id.104024
• 74. Olivares Sánchez, HR, Porth, O., Mizuno, Y.; (May 2018). The Black Hole Accretion Code: adaptive mesh refinement and constrained transport, Journal of Physics: Conference Series, Volume 1031, Issue 1, article id. 012008 (2018).
• 75. Mizuno, Yosuke, Younsi, Ziri, Fromm, Christian M., Porth, Oliver, De Laurentis, Mariafelicia, Olivares, Hector, Falcke, Heino, Kramer, Michael, Rezzolla, Luciano; (Apr 2018). The current ability to test theories of gravity with black hole shadows, Nature Astronomy, Volume 2, p. 585-590
• 76. Lyutikov, Maxim, Komissarov, Serguei, Sironi, Lorenzo, Porth, Oliver; (Apr 2018). Particle acceleration in explosive relativistic reconnection events and Crab Nebula gamma-ray flares, Journal of Plasma Physics, Volume 84, Issue 2, article id. 635840201, 31 pp.
• 77. de Avellar, Marcio G. B., Porth, Oliver, Younsi, Ziri, Rezzolla, Luciano; (Mar 2018). Kilohertz QPOs in low-mass X-ray binaries as oscillation modes of tori around neutron stars - I, Monthly Notices of the Royal Astronomical Society, Volume 474, Issue 3, p.3967-3975
• 78. Ripperda, B., Bacchini, F., Teunissen, J., Xia, C., Porth, O., Sironi, L., Lapenta, G., Keppens, R.; (Mar 2018). A Comprehensive Comparison of Relativistic Particle Integrators, The Astrophysical Journal Supplement Series, Volume 235, Issue 1, article id. 21, 20 pp. (2018).
• 79. Goddi, C., Falcke, H., Kramer, M., Rezzolla, L., Brinkerink, C., Bronzwaer, T., Davelaar, J. R. J., Deane, R., de Laurentis, M., Desvignes, G. et al.; (Jan 2018). BlackHoleCam: Fundamental physics of the galactic center, The Fourteenth Marcel Grossmann Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, held 12-18 July 2015 in Rome, Italy. Edited by Massimo Bianchi, Robert T Jansen and Remo Ruffini. Published by World Scientific Publishing Co. Pte. Ltd., 2018. ISBN #9789813226609, pp. 863-899
• 80. Porth, Oliver, Buehler, Rolf, Olmi, Barbara, Komissarov, Serguei, Lamberts, Astrid, Amato, Elena, Yuan, Yajie, Rudy, Alexander; (Jan 2018). Modelling Jets, Tori and Flares in Pulsar Wind Nebulae, Jets and Winds in Pulsar Wind Nebulae, Gamma-Ray Bursts and Blazars. Series: Space Sciences Series of ISSI, ISBN: 978-94-024-1291-8. Springer Netherlands (Dordrecht), Edited by Andrei Bykov, Elena Amato, Jonathan Arons, Maurizio Falanga, Martin Lemoine, Luigi Stella and Rudolf von Steiger, vol. 62, pp. 137-174
• 81. Fromm, C. M., Perucho, M., Porth, O., Younsi, Z., Ros, E., Mizuno, Y., Zensus, J. A., Rezzolla, L.; (Jan 2018). Jet-torus connection in radio galaxies. Relativistic hydrodynamics and synthetic emission, Astronomy & Astrophysics, Volume 609, id.A80, 16 pp.
• 82. Lyutikov, Maxim, Sironi, Lorenzo, Komissarov, Serguei S., Porth, Oliver; (Dec 2017). Particle acceleration in relativistic magnetic flux-merging events, Journal of Plasma Physics, Volume 83, Issue 6, article id. 635830602, 79 pp.
• 83. Lyutikov, Maxim, Sironi, Lorenzo, Komissarov, Serguei S., Porth, Oliver; (Dec 2017). Explosive X-point collapse in relativistic magnetically dominated plasma, Journal of Plasma Physics, Volume 83, Issue 6, article id. 635830601, 31 pp.
• 84. De Laurentis, Mariafelicia, Younsi, Ziri, Porth, Oliver, Mizuno, Yosuke, Fromm, Christian, Rezzolla, Luciano, Olivares, Hector; (Dec 2017). Observational signatures of spherically-symmetric black hole spacetimes, Journal of Physics: Conference Series, Volume 942, Issue 1, article id. 012007 (2017).
• 85. Toma, Kenji, Komissarov, Serguei S., Porth, Oliver; (Nov 2017). Rayleigh-Taylor instability in two-component relativistic jets, Monthly Notices of the Royal Astronomical Society, Volume 472, Issue 1, p.1253-1258
• 86. Ripperda, B., Porth, O., Xia, C., Keppens, R.; (Nov 2017). Reconnection and particle acceleration in interacting flux ropes - II. 3D effects on test particles in magnetically dominated plasmas, Monthly Notices of the Royal Astronomical Society, Volume 471, Issue 3, p.3465-3482
• 87. Millas, Dimitrios, Porth, Oliver, Keppens, Rony; (Nov 2017). Synchrotron Radiation Maps from Relativistic MHD Jet Simulations, Galaxies, vol. 5, issue 4, p. 79
• 88. Fromm, Christian, Porth, Oliver, Younsi, Ziri, Mizuno, Yosuke, de Laurentis, Mariafelica, Olivares, Hector, Rezzolla, Luciano; (Nov 2017). Radiative Signatures of Parsec-Scale Magnetised Jets, Galaxies, vol. 5, issue 4, p. 73
• 89. Monceau-Baroux, Remi, Porth, Oliver, Meliani, Zakaria, Keppens, Rony; (Nov 2017). The SS433 jet from subparsec to parsec scales (Corrigendum), Astronomy & Astrophysics, Volume 607, id.C4, 1 pp.
• 90. de Avellar, Marcio G B, Porth, Oliver, Younsi, Ziri, Rezzolla, Luciano; (Sep 2017). The kilo Hertz quasi-periodic oscillations in neutron star low-mass X-ray binaries as tori oscillation modes. I, eprint arXiv:1709.07706
• 91. Porth, Oliver, Buehler, Rolf, Olmi, Barbara, Komissarov, Serguei, Lamberts, Astrid, Amato, Elena, Yuan, Yajie, Rudy, Alexander; (Jul 2017). Modelling Jets, Tori and Flares in Pulsar Wind Nebulae, Space Science Reviews, Volume 207, Issue 1-4, pp. 137-174
• 92. Ripperda, B., Porth, O., Xia, C., Keppens, R.; (May 2017). Reconnection and particle acceleration in interacting flux ropes - I. Magnetohydrodynamics and test particles in 2.5D, Monthly Notices of the Royal Astronomical Society, Volume 467, Issue 3, p.3279-3298
• 93. Porth, Oliver, Olivares, Hector, Mizuno, Yosuke, Younsi, Ziri, Rezzolla, Luciano, Moscibrodzka, Monika, Falcke, Heino, Kramer, Michael; (May 2017). The black hole accretion code, Computational Astrophysics and Cosmology, Volume 4, Issue 1, article id.1, 42 pp.
• 94. Meliani, Zakaria, Mizuno, Yosuke, Olivares, Hector, Porth, Oliver, Rezzolla, Luciano, Younsi, Ziri; (Feb 2017). Simulations of recoiling black holes: adaptive mesh refinement and radiative transfer, Astronomy & Astrophysics, Volume 598, id.A38, 20 pp.
• 95. Goddi, C., Falcke, H., Kramer, M., Rezzolla, L., Brinkerink, C., Bronzwaer, T., Davelaar, J. R. J., Deane, R., de Laurentis, M., Desvignes, G. et al.; (Jan 2017). BlackHoleCam: Fundamental physics of the galactic center, International Journal of Modern Physics D, Volume 26, Issue 2, id. 1730001-239
• 96. De Laurentis, Mariafelicia, Porth, Oliver, Bovard, Luke, Ahmedov, Bobomurat, Abdujabbarov, Ahmadjon; (Dec 2016). Constraining alternative theories of gravity using GW150914 and GW151226, Physical Review D, Volume 94, Issue 12, id.124038
• 97. Porth, O., Vorster, M. J., Lyutikov, M., Engelbrecht, N. E.; (Aug 2016). Diffusion in pulsar wind nebulae: an investigation using magnetohydrodynamic and particle transport models, Monthly Notices of the Royal Astronomical Society, Volume 460, Issue 4, p.4135-4149
• 98. Lyutikov, Maxim, Sironi, Lorenzo, Komissarov, Sergey, Porth, Oliver; (Mar 2016). Particle acceleration in explosive relativistic reconnection events and Crab Nebula gamma-ray flares, eprint arXiv:1603.05731
• 99. Lyutikov, Maxim, Komissarov, Serguei S., Porth, Oliver; (Feb 2016). The inner knot of the Crab nebula, Monthly Notices of the Royal Astronomical Society, Volume 456, Issue 1, p.286-299
• 100. Komissarov, Serguei S., Porth, Oliver, Lyutikov, Maxim; (Nov 2015). Stationary relativistic jets, Computational Astrophysics and Cosmology, Volume 2, article id.9, 16 pp.
• 101. Porth, Oliver, Komissarov, Serguei S.; (Sep 2015). Causality and stability of cosmic jets, Monthly Notices of the Royal Astronomical Society, Volume 452, Issue 2, p.1089-1104
• 102. Keppens, R., Xia, C., Porth, O.; (Jun 2015). Solar Prominences: "Double, Double... Boil and Bubble", The Astrophysical Journal Letters, Volume 806, Issue 1, article id. L13, 7 pp. (2015).
• 103. Monceau-Baroux, Rémi, Porth, Oliver, Meliani, Zakaria, Keppens, Rony; (Feb 2015). The SS433 jet from subparsec to parsec scales, Astronomy & Astrophysics, Volume 574, id.A143, 7 pp.
• 104. Keppens, R., Porth, O., Xia, C.; (Nov 2014). Interacting Tilt and Kink Instabilities in Repelling Current Channels, The Astrophysical Journal, Volume 795, Issue 1, article id. 77, 10 pp. (2014).
• 105. Porth, Oliver, Komissarov, Serguei S., Keppens, Rony; (Sep 2014). Rayleigh-Taylor instability in magnetohydrodynamic simulations of the Crab nebula, Monthly Notices of the Royal Astronomical Society, Volume 443, Issue 1, p.547-558
• 106. Porth, O., Xia, C., Hendrix, T., Moschou, S. P., Keppens, R.; (Sep 2014). MPI-AMRVAC for Solar and Astrophysics, The Astrophysical Journal Supplement Series, Volume 214, Issue 1, article id. 4, 26 pp. (2014).
• 107. Xia, C., Keppens, R., Antolin, P., Porth, O.; (Sep 2014). Simulating the in Situ Condensation Process of Solar Prominences, The Astrophysical Journal Letters, Volume 792, Issue 2, article id. L38, 6 pp. (2014).
• 108. Monceau-Baroux, R., Porth, O., Meliani, Z., Keppens, R.; (Jul 2014). Multi-scale virtual view on the precessing jet SS433, The X-ray Universe 2014, edited by Jan-Uwe Ness. Online at http://www.cosmos.esa.int/web/xmm-newton/2014-symposium/, id.147
• 109. Walg, S., Achterberg, A., Markoff, S., Keppens, R., Porth, O.; (Apr 2014). Relativistic AGN jets - II. Jet properties and mixing effects for episodic jet activity, Monthly Notices of the Royal Astronomical Society, Volume 439, Issue 4, p.3969-3985
• 110. Fendt, Christian, Porth, Oliver, Sheikhnezami, Somayeh; (Mar 2014). Formation and Collimation of Relativistic MHD Jets — Simulations and Radio Maps, International Journal of Modern Physics: Conference Series, Volume 28, id. 1460190
• 111. Porth, Oliver, Komissarov, Serguei S., Keppens, Rony; (Mar 2014). Solution to the Sigma Problem of Pulsar Wind Nebulae, International Journal of Modern Physics: Conference Series, Volume 28, id. 1460168
• 112. Porth, Oliver, Komissarov, Serguei S., Keppens, Rony; (Feb 2014). Three-dimensional magnetohydrodynamic simulations of the Crab nebula, Monthly Notices of the Royal Astronomical Society, Volume 438, Issue 1, p.278-306
• 113. Monceau-Baroux, Rémi, Porth, Oliver, Meliani, Zakaria, Keppens, Rony; (Jan 2014). Relativistic 3D precessing jet simulations for the X-ray binary SS433, Astronomy & Astrophysics, Volume 561, id.A30, 11 pp.
• 114. Keppens, R., Porth, O., Monceau-Baroux, R., Walg, S.; (Dec 2013). Relativistic HD and MHD modelling for AGN jets, Plasma Physics and Controlled Fusion, Volume 55, Issue 12, article id. 124038 (2013).
• 115. Keppens, R., Porth, O., Galsgaard, K., Frederiksen, J. T., Restante, A. L., Lapenta, G., Parnell, C.; (Sep 2013). Resistive magnetohydrodynamic reconnection: Resolving long-term, chaotic dynamics, Physics of Plasmas, Volume 20, Issue 9, article id. 092109 17 pp. (2013).
• 116. Porth, O., Komissarov, S. S., Keppens, R.; (Apr 2013). Solution to the sigma problem of pulsar wind nebulae., Mon. Not. R. Astron. Soc., Vol. 431, p. L48-L52 (2013)
• 117. Porth, O.; (Mar 2013). Three-dimensional structure of relativistic jet formation, Monthly Notices of the Royal Astronomical Society, Volume 429, Issue 3, p.2482-2492
• 118. Sheikhnezami, Somayeh, Fendt, Christian, Porth, Oliver, Vaidya, Bhargav, Ghanbari, Jamshid; (Sep 2012). Bipolar Jets Launched from Magnetically Diffusive Accretion Disks. I. Ejection Efficiency versus Field Strength and Diffusivity, The Astrophysical Journal, Volume 757, Issue 1, article id. 65, 23 pp. (2012).
• 119. Fendt, Christian, Porth, Oliver, Vaidya, Bhargav; (Jul 2012). Formation and propagation of MHD jets - relativistic jets, radiation pressure, and shock-induced rotation, Journal of Physics: Conference Series, Volume 372, Issue 1, id. 012011 (2012).
• 120. Vaidya, B., Fendt, C., Beuther, H., Porth, O.; (Jul 2012). Jets From Young Massive Stars, Advances in computational astrophysics: methods, tools, and outcome. Proceedings of a conference held at Cefalù, Italy 13 - 17 June 2011. ASP Conference Proceedings, Vol. 453. Edited by R. Capuzzo-Dolcetta, M. Limongi, and A. Tornambè. San Francisco: Astronomical Society of the Pacific, 2012., p.403
• 121. Fiestas, J., Porth, O., Berczik, P., Spurzem, R.; (Jan 2012). Evolution of growing black holes in axisymmetric galaxy cores, Monthly Notices of the Royal Astronomical Society, Volume 419, Issue 1, pp. 57-69.
• 122. Vaidya, Bhargav, Fendt, Christian, Beuther, Henrik, Porth, Oliver; (Nov 2011). Jet Formation from Massive Young Stars: Magnetohydrodynamics versus Radiation Pressure, The Astrophysical Journal, Volume 742, Issue 1, article id. 56, 21 pp. (2011).
• 123. Porth, Oliver, Fendt, Christian, Meliani, Zakaria, Vaidya, Bhargav; (Aug 2011). Synchrotron Radiation of Self-collimating Relativistic Magnetohydrodynamic Jets, The Astrophysical Journal, Volume 737, Issue 1, article id. 42, 22 pp. (2011).
• 124. Porth, Oliver; (Jun 2011). Two component relativistic acceleration and polarized radiation of the parsec-scale AGN jet, Advances in Plasma Astrophysics, Proceedings of the International Astronomical Union, IAU Symposium, Volume 274, p. 258-262
• 125. Fendt, Christian, Vaidya, Bhargav, Porth, Oliver, Nezami, Somayeh Sheikh; (Feb 2011). MHD simulations of jet formation - protostellar jets & applications to AGN jets, Jets at all Scales, Proceedings of the International Astronomical Union, IAU Symposium, Volume 275, p. 383-391
• 126. Porth, O.; (Jan 2011). Simulations and synchrotron radiation from the relativistic jet base, Memorie della Societa Astronomica Italiana, v.82, p.125 (2011)
• 127. Porth, Oliver, Fendt, Christian; (Feb 2010). Acceleration and Collimation of Relativistic Magnetohydrodynamic Disk Winds, The Astrophysical Journal, Volume 709, Issue 2, pp. 1100-1118 (2010).
• 128. Porth, Oliver, Fendt, Christian; (Jan 2010). From Disk Winds to Relativistic Jets, International Journal of Modern Physics D, Volume 19, Issue 06, pp. 677-682 (2010).
• 129. Porth, Oliver; (Jan 2009). Relativistic Jet collimation and acceleration, "Physics of Galactic Nuclei, Proceedings of the conference held 15-19 June, 2009 at Ringberg Castle. Published online at http://www.mpe.mpg.de/events/pgn09/online_proceedings.html, id.36"
• 130. Fiestas, J., Porth, O., Spurzem, R.; (May 2008). Dynamical Evolution of Rotating Globular Clusters with Embedded Black Holes, Dynamical Evolution of Dense Stellar Systems, Proceedings of the International Astronomical Union, IAU Symposium, Volume 246, p. 166-170
• 131. Ernst, A., Just, A., Spurzem, R., Porth, O.; (Jan 2008). Escape from the vicinity of fractal basin boundaries of a star cluster, Monthly Notices of the Royal Astronomical Society, Volume 383, Issue 3, pp. 897-906.