Sgr A* Spectral Modeling

The spectra below are computed with the multi-wavelength Monte Carlo ray-tracing code GRMONTY (Dolence et al., 2009).  The models in Figs. 1-3 emulate Sgr A* data (points with error bars) from ν = 10¹⁰ Hz microwaves to 10¹⁹ Hz

• Electron temperature (f_e ,β_c) models have steeper-than-observed spectrum, likely corona-dominated
• Beta models have flatter-than-observed spectra near sub mm-bump, but similar slopes to observed spectrum after
• Bias model spectra are slightly flatter-than-observed and overproduce the high frequency end

Figure 1

Spectra (νL_ν vs. ν) for constant electron heating fraction with critical beta model (f_e,β_c) = (0.1,1) (left) and (0.5,1) (right) from 10¹⁰ Hz microwaves to 10¹⁹ Hz

Figure 2

 

Beta model spectra from 10¹⁰ Hz microwaves to 10¹⁹ Hz x-rays for β = 0.01 (left), 0.1 (middle) and 1 (right).

Figure 3

 

Bias model spectra from 10¹⁰ Hz microwaves to 10¹⁹ Hz x-rays for N = 0 (left), 2 (middle) and 4 (right).

The temporal evolution of spectra for the model (f_e ,β_c)=(0.5,1) is shown below for a few simulation times.

Figure 4

 

T=10,000M                        T=10,010M                     T=10,100M                      T=11,000M

a.) Spectra for the model (f_e ,β_c)=(0.5,1) at logarithmically spaced timesteps T=10,000M, 10,010M, 10,100M and 11,000M

     

T=9,000M                                               T=10,000M                                       T=11,000M

b.) Spectra for the model (f_e ,β_c)=(0.5,1) at linearly spaced timesteps T=9,000M, 10,000M and 11,000M