Improving Electron Thermodynamics in GRMHD Simulations of Black Hole Accretion

Metadata Updated: February 28, 2019

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: U.S. Government Work

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Metadata Created Date February 28, 2019
Metadata Updated Date February 28, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date February 28, 2019
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_89236
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 22573ce9-7e09-429c-82cd-195e5c6b9612
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2017-08-01
Homepage URL
Data Last Modified 2018-09-07
Program Code 026:027
Source Datajson Identifier True
Source Hash ee09d02dc6b81bdc7dfa7b5e48a105c25b10af54
Source Schema Version 1.1

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