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The Effects of Resolution on Black Hole Accretion Simulations of Jets
Christopher J. White, Fiona Chrystal
We perform three general-relativistic magnetohydrodynamic simulations of black hole accretion designed to test how sensitive results are to grid resolution in the jet region. The c…
Looking for the underlying cause of black hole X-ray variability in GRMHD simulations
D. A. Bollimpalli, R. Mahmoud, C. Done +4
Long-term observations have shown that black hole X-ray binaries exhibit strong, aperiodic variability on time-scales of a few milliseconds to seconds. The observed light curves di…
Ab Initio Horizon-Scale Simulations of Magnetically Arrested Accretion in Sagittarius A* Fed by Stellar Winds
Sean M. Ressler, Christopher J. White, Eliot Quataert +1
We present 3D general relativistic magnetohydrodynamic (GRMHD) simulations of the accretion flow surrounding Sagittarius A* that are initialized using larger-scale MHD simulations…
The Athena++ Adaptive Mesh Refinement Framework: Design and Magnetohydrodynamic Solvers
James M. Stone, Kengo Tomida, Christopher J. White +1
The design and implementation of a new framework for adaptive mesh refinement (AMR) calculations is described. It is intended primarily for applications in astrophysical fluid dyna…
The Structure of Radiatively Inefficient Black Hole Accretion Flows
Christopher J. White, Eliot Quataert, Charles F. Gammie
We run three long-timescale general-relativistic magnetohydrodynamic simulations of radiatively inefficient accretion flows onto non-rotating black holes. Our aim is to achieve ste…
The Effects of Tilt on the Images of Black Hole Accretion Flows
Christopher J. White, Jason Dexter, Omer Blaes +1
We analyze two 3D general-relativistic magnetohydrodynamic accretion simulations in the context of how they would manifest in Event Horizon Telescope (EHT) observations of supermas…