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| Paper: |
Constraining the Accretion Flow in Sgr A* by GR Dynamical and Radiative Modeling |
| Volume: |
439, The Galactic Center: a Window to the Nuclear Environment of Disk Galaxies |
| Page: |
372 |
| Authors: |
Shcherbakov, R. V.; Penna, R. F. |
| Abstract: |
We present the combination of dynamical accretion model based on 3D GRMHD simulations and general
relativistic (GR) polarized radiative transfer. We write down the formalism of and perform the GR
ray-tracing of cyclo-synchrotron radiation through the model of accretion flow in Sagittarius A*.
GR polarimetric imaging is presented as well as the results for spectrum for a probable set of
spins and orientations. Precise fitting formulae for Faraday rotation and Faraday conversion
coefficients are employed for thermal plasma. The axisymmetic flow pattern and the magnetic field
geometry correspond to averaged 3D GRMHD simulations near the black hole, whereas the analytic
model was used far from the black hole. The density scaling is found by fitting the sub-mm flux.
Spin a=0.7 and inclination angle θ = 0.6 produce the best fit to sub-mm flux and linear
polarization fraction. |
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