The X-ray Ridge Surrounding Sgr A* at the Galactic Center

Abstract

We present the first detailed simulation of the interaction between the supernova explosion that produced Sgr A East and the wind-swept inner ~ 2-pc region at the Galactic center. The passage of the supernova ejecta through this medium produces an X-ray ridge ~ 9'' to 15'' to the NE of the supermassive black hole Sagittarius A* (Sgr A*). We show that the morphology and X-ray intensity of this feature match very well with recently obtained Chandra images, and we infer a supernova remnant age of less than 2,000 years. This young age--a factor 3--4 lower than previous estimates--arises from our inclusion of stellar wind effects in the initial (pre-explosion) conditions in the medium. The supernova does not clear out the central ~ 0.2-pc region around Sgr~A* and does not significantly alter the accretion rate onto the central black hole upon passage through the Galactic center.

arXiv comment10 pages, 3 figures, submitted to ApJL

References in corpus (10)

• Chandra X-ray Spectroscopic Imaging of Sgr A* and the Central Parsec of the Galaxy
• The Supermassive Black Hole at the Galactic Center
• A Chandra Study of Sgr A East: A Supernova Remnant Regulating The Activity Of Our Galactic Center?
• Equivalent width, shape and proper motion of the iron fluorescent line emission from the molecular clouds as an indicator of the illuminating source X-ray flux history
• Diffuse X-Rays from the Inner 3 Parsecs of the Galaxy
• Accretion of cool stellar winds on Sgr A*: another puzzle of the Galactic Centre?
• Three New Supernova Remnant OH Masers Near the Galactic Center: Evidence for Large Scale Maser Emission from Supernova Remnants
• Gamma-Rays from Single Lobe Supernova Explosions
• A Monte Carlo Study of the 6.4 keV Emission at the Galactic Center
• Spin-Induced Disk Precession in Sagittarius A*

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• A New Perspective of the Radio Bright Zone at The Galactic Center: Feedback from Nuclear Activities
• Unbound Debris Streams and Remnants Resulting From the Tidal Disruptions of Stars by Supermassive Black Holes
• Radio Detection of A Candidate Neutron Star Associated with Galactic Center Supernova Remnant Sagittarius A East
• The Sgr B2 X-ray Echo of the Galactic Center Supernova Explosion that Produced Sgr A East
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• Galactic center gamma-ray production by cosmic rays from stellar winds and Sgr A East
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• Probing the Density in the Galactic Center Region: Wind-Blown Bubbles and High-Energy Proton Constraints
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