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The Shadow of a Spherically Accreting Black Hole
Ramesh Narayan, Michael D. Johnson, Charles F. Gammie
We explore a simple spherical model of optically thin accretion on a Schwarzschild black hole, and study the properties of the image as seen by a distant observer. We show that a d…
Puffy accretion disks: sub-Eddington, optically thick, and stable
Debora Lančová, David Abarca, Włodek Kluźniak +6
We report on a new class of solutions of black hole accretion disks that we have found through three-dimensional, global, radiative magnetohydrodynamic simulations in general relat…
The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project
Oliver Porth, Koushik Chatterjee, Ramesh Narayan +25
Recent developments in compact object astrophysics, especially the discovery of merging neutron stars by LIGO, the imaging of the black hole in M87 by the Event Horizon Telescope (…
Electron and Proton Heating in Transrelativistic Guide Field Reconnection
Michael E. Rowan, Lorenzo Sironi, Ramesh Narayan
The plasma in low-luminosity accretion flows, such as the one around the black hole at the center of M87 or Sgr A* at our Galactic Center, is expected to be collisioness and two-te…