A past capture event at Sagittarius A* inferred from the fluorescent X-ray emission of Sagittarius B clouds

Details A past capture event at Sagittarius A* inferred from the fluorescent X-ray emission of Sagittarius B clouds A past capture event at Sagittarius A* inferred from the fluorescent X-ray emission of Sagittarius B clouds

2010-10-07

arxiv.org/abs/1010.1312v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

7 pages, 1 figure, accepted for publication in MNRAS

Scientific paper

The fluorescent X-ray emission from neutral iron in the molecular clouds (Sgr B) indicates that the clouds are being irradiated by an external X-ray source. The source is probably associated with the Galactic central black hole (Sgr A*), which triggered a bright outburst one hundred years ago. We suggest that such an outburst could be due to a partial capture of a star by Sgr A*, during which a jet was generated. By constraining the observed flux and the time variability ($\sim$ 10 years) of the Sgr B's fluorescent emission, we find that the shock produced by the interaction of the jet with the dense interstellar medium represents a plausible candidate for the X-ray source emission.

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