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GRRMHD Simulations of Tidal Disruption Event Accretion Disks around Supermassive Black Holes: Jet Formation, Spectra, and Detectability
Brandon Curd, Ramesh Narayan
We report results from general relativistic radiation MHD (GRRMHD) simulations of a super-Eddington black hole (BH) accretion disk formed as a result of a tidal disruption event (T…
Testing General Relativity with the Black Hole Shadow Size and Asymmetry of Sagittarius A*: Limitations from Interstellar Scattering
Ziyan Zhu, Michael D. Johnson, Ramesh Narayan
The Event Horizon Telescope (EHT), a global 230 GHz VLBI array, achieves an angular resolution of , sufficient to resolve the supermassive black hole Sagit…
Density jump as a function of magnetic field strength for parallel collisionless shocks in pair plasmas
Antoine Bret, Ramesh Narayan
Collisionless shocks follow the Rankine-Hugoniot jump conditions to a good approximation. However, for a shock propagating parallel to a magnetic field, magnetohydrodynamics states…
Fast radio burst source properties from polarization measurements
Wenbin Lu, Pawan Kumar, Ramesh Narayan
Recent polarization measurements of fast radio bursts (FRBs) provide new insights on these enigmatic sources. We show that the nearly 100% linear polarization and small variation o…
Two-temperature, Magnetically Arrested Disc simulations of the jet from the supermassive black hole in M87
Andrew Chael, Ramesh Narayan, Michael D. Johnson
We present two-temperature, radiative general relativistic magnetohydrodynamic simulations of Magnetically Arrested Discs (MAD) that launch powerful relativistic jets. The mass acc…
Numerical evolution of shocks in the interior of Kerr black holes
Paul M. Chesler, Erik Curiel, Ramesh Narayan
We numerically solve Einstein's equations coupled to a scalar field in the interior of Kerr black holes. We find shock waves form near the inner horizon. The shocks grow exponentia…