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 = 10^{10} Hz microwaves to 10^{19} 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 10^{10} Hz microwaves to 10^{19} Hz

Figure 2

Beta model spectra from 10^{10} Hz microwaves to 10^{19} Hz x-rays for β = 0.01 (left), 0.1 (middle) and 1 (right).

Figure 3

Bias model spectra from 10^{10} Hz microwaves to 10^{19} 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=10,100M T=11,000M

a.) Spectra for the model (f_{e} ,β_{c})=(0.5,1) at logarithmically spaced timesteps T=10,000M,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