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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 1.

Top: temporal and azimuthal averages of the plasma-β for the suite of GRMHD simulations listed in Table 1. The color scales for all the simulations are the same and shown in the right-most color bar. Blue represents 〈〈β〉〉 < 0.2 and shows the strongly magnetized regions. Red represents 〈〈β〉〉 > 0.2 and shows the gas dominated regions. The black solid lines mark the β = 0.2 contours. The saturated red regions around the equator of all the SANE simulation indicate that they are gas dominated, while the MAD simulations have stronger magnetic fields. Bottom: temporal and azimuthal averages of the comoving dimensionless gas temperature 〈〈T〉〉. The color scales for all the panels are the same and shown in the right-most color bar. Green and yellow are low and high temperatures, respectively. Note that all simulations show a low plasma-β/high temperature funnel region except for the non-spinning SANE simulation a0SANE. The simulations are described in detail in Narayan et al. (2012) and Sa¸dowski et al. (2013a).

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