X-Ray Observations on the Galactic Center Region

Details X-Ray Observations on the Galactic Center Region X-Ray Observations on the Galactic Center Region

2001-08-07

arxiv.org/abs/astro-ph/0108109v1

Astronomy and Astrophysics

Astrophysics

6 pages, 8 figures, to appear in the proceedings of the "New Century of X-ray Astronomy" symposium, ASP Conference Series

Scientific paper

This paper reports on the early Chandra view of the Galactic center (GC) activities. The massive black hole Sgr A* is extremely faint, while more bright diffuse X-ray emission is prevailing in the circumnuclear disk. Another high temperature plasma is found in the Sgr A East shell. This may indicate that Sgr A East is a supernova remnant, although no clear X-ray shell is found. A hint of non-thermal X-ray filaments is found, suggesting the presence of an acceleration site of extremely high-energy cosmic rays. The giant molecular cloud Sgr B2 is established to be an X-ray reflection nebula, possibly arising from the past Sgr A activities. Chandra further discovered high temperature shells, suggesting multiple supernova explosions near the GC region.

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