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THE POWER OF IMAGING: CONSTRAINING THE PLASMA PROPERTIES OF GRMHD SIMULATIONS USING EHT OBSERVATIONS OF Sgr A*

  • Authors: Chi-Kwan Chan, Dimitrios Psaltis, Feryal Özel, Ramesh Narayan, and Aleksander Sa¸dowski

Chan et al. 2015 The Astrophysical Journal 799 1.

  • Provider: AAS Journals

Caption: Figure 6.

Effect of varying the observer's inclination on the predicted images for the a9SANE simulation at two different frequencies. At low frequencies, e.g., at ν = 1011 Hz shown in the top row, as the observer's inclination increases, a larger fraction of the hot inner flow is obscured by the colder outer disk. This effect cancels out the fact that both the upper and lower funnel regions become visible, and produces an overall weak dependence of the inclination. In contrast, at intermediate frequencies, e.g., at ν = 1013 Hz shown in the bottom row, the optically thin accretion disk never obscures the funnel and the highest flux occurs at the highest inclinations, where Doppler effects are maximal. The observer's inclination has a negligible effect on the X-rays (not shown here), which originate from an optically thin, quasi-spherical large volume.

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