Sgr A East and its surroundings observed in X-rays
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*.
- Publication:
-
Advances in Space Research
- Pub Date:
- 2004
- DOI:
- 10.1016/j.asr.2003.07.024
- arXiv:
- arXiv:astro-ph/0308373
- Bibcode:
- 2004AdSpR..33..403S
- Keywords:
-
- XMM-Newton observations;
- X-rays;
- Sgr A East;
- Supernova remnant (SNR);
- Astrophysics
- E-Print:
- 7 pages, 3 figures, Accepted for publication in Advances in Space Research, as a proceeding paper for the 34th COSPAR E1.4 "High Energy Studies of Supernova Remnants and Neutron stars" held at Houston, Texas, USA during 10-19 Oct 2002