Why We Should Kerr About the Dark Secrets of Relativistic Accretion Disks in Athena++

Author: ORCID icon orcid.org/0000-0002-9183-5593
Rohr, Eric, Astronomy, University of Virginia
Davis, Shane, Astronomy, University of Virginia

Monte Carlo numerical solutions to the radiation transfer equation in curved spacetime require both sampling of radiation-matter interactions and calculation of the null geodesics for photon trajectories. Our code, written in C++ using the Athena++ grid framework, integrates geodesics in general spacetimes, with a particular focus on Kerr metric of spinning black holes. Since our main intent is studying accretion disks around supermassive black holes, we include free-free absorption and emission along with polarized or unpolarized Compton scattering. After showing convergence and performance comparisons to other codes on test problems, we generate synthetic spectra from accretion disk models and simulations.

BS (Bachelor of Science)
accretion, accretion disks, black hole physics, methods: numerical , radiative transfer, relativistic processes
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