General Relativistic Magnetohydrodynamic and Monte Carlo Modeling of Sagittarius A*

TL;DR

This paper combines GRMHD and Monte Carlo simulations to model the accretion disk and emergent spectrum of Sagittarius A*, providing insights into the physical conditions near the black hole.

Contribution

It introduces a novel integrated modeling approach using HARM and Monte Carlo methods to simulate the accretion environment and spectrum of Sagittarius A*.

Findings

Simulated accretion disk parameters around Sagittarius A*

Generated emergent spectrum matching observational data

Demonstrated the effectiveness of combined GRMHD and Monte Carlo modeling

Abstract

We present results of models of the physical space and parameters of the accretion disk of Sagittarius A*, as well as simulations of its emergent spectrum. This begins with HARM, a 2D general relativistic magneto-hydrodynamic (GRMHD) model, specifically set up to evolve the space around a black hole. Data from HARM are then fed into a 2D Monte-Carlo (MC) code which generates and tracks emitted photons, allowing for absorption and scattering before they escape the volume.