A First Look at the Nuclear Region of M31 with Chandra

Details A First Look at the Nuclear Region of M31 with Chandra A First Look at the Nuclear Region of M31 with Chandra

2000-03-17

arxiv.org/abs/astro-ph/0003262v1

Astronomy and Astrophysics

Astrophysics

Submitted to ApJ Letters, 4 pages, 4 figures. email: garcia,ssm,fap,wrf,jem,cjf, @head-cfa.harvard.edu

Scientific paper

10.1086/312751

We report on the first observation of the nuclear region of M31 with the Chandra X-ray Observatory. The nuclear source seen with the Einstein and ROSAT HRIs is resolved into five point sources. One of these sources is within 1'' of the M31 central super-massive black hole. As compared to the other point sources in M31, this nuclear source has an unusual x-ray spectrum. Based on the spatial coincidence we identify this source with the central black hole, and note that the unusual spectrum is a challenge to current theories. A bright transient is detected ~26'' to the west of the nucleus, which may be associated with a stellar mass black hole.

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