A parameter survey of Sgr A* radiative models from GRMHD simulations with self-consistent electron heating

Understand

The Galactic center black hole candidate Sgr A* is the best target for studies of low-luminosity accretion physics, including with near-infrared and submillimeter wavelength long baseline interferometry experiments.

• Here we compare images and spectra generated from a parameter survey of general relativistic MHD simulations to a set of radio to near-infrared observations of Sgr A*.
• Our models span the limits of weak and strong magnetization and use a range of sub-grid prescriptions for electron heating.
• We find two classes of scenarios can explain the broad shape of the submillimeter spectral peak and the highly variable near-infrared flaring emission.