Origin of Thermal and Non-Thermal Hard X-Ray Emission from the Galactic Center

2009/06/12 by Vladimir Dogiel, Vladimir A. Dogiel, Dmitrii O. Chernyshov +12
Physics and Astronomy · #Accretion (finance) #Accretion disc #Active galactic nucleus #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #Bremsstrahlung #Flux (metallurgy) #Galactic Center #Galaxies: Formation, Evolution, Phenomena #Stars #Supermassive black hole #Thermal #astro-ph.GA #astro-ph.HE

paper · pdf · doi:10.1093/pasj/61.5.1099

published as PoS Integral08:029,2008 · to be published in PASJ, v.61, No.5, 2009

arxiv created 2009/06/12 · openalex publication_date 2009/10/25 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Abstract We analyse new results of Chandra and Suzaku Observatories which found a flux of hard X-ray emission from the compact region around Sgr A^∗ (r∼ 100 pc). We suppose that this emission is generated by accretion processes onto the central supermassive blackhole when an unbound part of captured stars obtains an additional momentum. As a result a flux of subrelativistic protons is generated near the galactic center which heats the background plasma up to temperatures about 6–10 keV and produces by inverse bremsstrahlung a flux of non-thermal X-ray emission in the energy range above 10 keV.

Citations

• In-situ acceleration of subrelativistic electrons in the Coma halo and the halo's influence on the Sunyaev-Zeldovich effect
• Tidal Disruption of a Solar‐Type Star by a Supermassive Black Hole
• Diffuse X‐Ray Emission in a DeepChandraImage of the Galactic Center
• An asymmetric distribution of positrons in the Galactic disk revealed by γ-rays
• Iron Emission Lines on the Galactic Ridge Observed with Suzaku
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