Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-07-28
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
25 pages, 8 figures, submitted to ApJ
Scientific paper
We confirm our earlier tentative detection of M31* in X-rays and measure its light-curve and spectrum. Observations in 2004-2005 find M31* rather quiescent in the X-ray and radio. However, X-ray observations in 2006-2007 and radio observations in 2002 show M31* to be highly variable at times. A separate variable X-ray source is found near P1, the brighter of the two optical nuclei. The apparent angular Bondi radius of M31* is the largest of any black hole, and large enough to be well resolved with Chandra. The diffuse emission within this Bondi radius is found to have an X-ray temperature ~0.3 keV and density 0.1 cm-3, indistinguishable from the hot gas in the surrounding regions of the bulge given the statistics allowed by the current observations. The X-ray source at the location of M31* is consistent with a point source and a power law spectrum with energy slope 0.9+/-0.2. Our identification of this X-ray source with M31* is based solely on positional coincidence.
Baganoff Frederick Keith
Galache Jose
Garcia Michael R.
Hextall Richard
Melia Fulvio
No associations
LandOfFree
X-ray and Radio Variability of M31*, The Andromeda Galaxy Nuclear Supermassive Black Hole does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with X-ray and Radio Variability of M31*, The Andromeda Galaxy Nuclear Supermassive Black Hole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray and Radio Variability of M31*, The Andromeda Galaxy Nuclear Supermassive Black Hole will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-682460