Improving Electron Thermodynamics in GRMHD Simulations of Black Hole Accretion

Metadata Updated: November 12, 2020

The goal of this project remains to improve the electron thermodynamic calculations in General Relativistic Magnetohydrodynamics (GRMHD) simulations of low accretion rate systems to allow for more predictive modeling of astrophysical systems. We have successfully implemented a model in 3D GRMHD simulations that separately evolves an electron entropy equation, including the effects of electron heating and anisotropic electron thermal conduction along magnetic field lines. I am in the the later stages of using these simulations to compare to observations of the supermassive black hole at the galactic center, Sagittarius A, and have found that our model can naturally produce most features of the spectral energy distribution with only a limited number of free parameters. In collaboration with Ben Ryan of UIUC, I am improving this model to include the effects of radiative cooling, scattering, and absorption on both the electrons and total fluid. This for the first time allows for self-consistent comparison of simulations to observations of systems with higher accretion rates than Sgr A where radiative cooling is more efficient. Future work will apply this scheme to observations of the supermassive black hole in M87 and certain X-ray binary systems. Additional future work will focus on adding the effects of electron-ion Coulomb collisions on the electron entropy equation and improving the semi-analytic calculations of our closure model for electron heating.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_89236
Data First Published 2017-08-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash 12190a16792ff642ec9145a4f4975bfbf6a6766d
Source Schema Version 1.1

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