A Dynamical Model for Hot Gas in the Galactic Center

Abstract

Winds from massive stars supply ~ 10^{-3} solar masss/year of gas to the central parsec of the Galactic Center. Spherically symmetric hydrodynamic calculations show that ~ 1 % of this gas, or ~ 10^{-5} solar masses/year, flows in towards the central massive black hole Sgr A*; the remaining gas, ~ 10^{-3} solar masses/year, is thermally driven out of the central star cluster in a wind. This dynamical model accounts for the level of diffuse X-ray emission observed in the Galactic Center by Chandra and the extended X-ray source coincident with Sgr A*; the latter is a direct signature of gas being gravitational captured by the black hole.

submitted to ApJ Letters

References in corpus (6)

• A Geometric Determination of the Distance to the Galactic Center
• Variable Infrared Emission from the Supermassive Black Hole at the Center of the Milky Way
• XMM-Newton observation of the brightest X-ray flare detected so far from SgrA*
• Diffuse X-Rays from the Inner 3 Parsecs of the Galaxy
• Direct Feeding of the Black Hole at the Galactic Center with Radial Gas Streams from Close-In Stellar Winds
• X-ray Scattering Halos from the Galactic Center: Implications for Diffuse Emission Around SgrA*

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