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Sgr A East and its surroundings observed in X-rays

Masaaki Sakano·Robert S. Warwick·Anne Decourchelle
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Abstract

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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Masaaki Sakano, Robert S. Warwick, Anne Decourchelle. 2003-08-21. Sgr A East and its surroundings observed in X-rays. https://doi.org/10.1016/j.asr.2003.07.024

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