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

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

2005-06-10

arxiv.org/abs/astro-ph/0506244v1

Astrophys.J. 635 (2005) L141-L144

Astronomy and Astrophysics

Astrophysics

10 pages, 3 figures, submitted to ApJL

Scientific paper

10.1086/499360

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.

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