Sgr A East and its surroundings observed in X-rays

Details Sgr A East and its surroundings observed in X-rays Sgr A East and its surroundings observed in X-rays

2003-08-21

arxiv.org/abs/astro-ph/0308373v1

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures, Accepted for publication in Advances in Space Research, as a proceeding paper for the 34th COSPAR E1.4 "Hi

Scientific paper

10.1016/j.asr.2003.07.024

We report the results of an XMM-Newton observation of Sgr A East and its surroundings. The X-ray spectrum of Sgr A East is well represented with a two-temperature plasma model with temperatures of ~1 and ~4 keV. Only the iron abundance shows clear spatial variation; it concentrates in the core of Sgr A East. The derived plasma parameters suggest that Sgr A East originated in a single supernova. Around Sgr A East, there is a broad distribution of hard X-ray emission with a superimposed soft excess component extending away from the location of Sgr A East both above and below the plane. We discuss the nature of these structures as well as the close vicinity of Sgr A*.

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