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Title: X-ray constraints on the number of stellar mass black holes in the inner parsec
Authors: Deegan, Patrick
Nayakshin, Sergei
First Published: 1-Jan-2006
Presented at: Galactic Center Workshop From the Center of the Milky Way to Nearby Low-Luminosity Galactic Nuclei, Bad Honnef, GERMANY
Start Date: 18-Apr-2006
End Date: 22-Apr-2006
Publisher: IOP Publishing
Citation: Galactic Center Workshop 2006: From the Center of the Milky Way to Nearby Low-Luminosity Galactic Nuclei, 2006, 54, pp. 306-310 (5)
Abstract: Due to dynamical friction stellar mass black holes should form a cusp in the inner parsec. Calculations [5, 6] show that approximately 20 thousand black holes would be present in a sphere with radius of about a parsec around Sgr A*. The presence of these objects opens up the possibility that they might be accreting ''cool'' gas (i.e. the Minispiral) as discussed by Morris [6]. Here we calculate the X-ray emission expected from these black holes as a method to constrain their population. We find that the data limits the total number of such black holes to around 10 - 20 thousand. Even a much smaller number of such black holes, i.e. 5 thousand, is sufficient to produce several sources with X-ray luminosity above Lx ~ 1033 erg s−1 at any one time. We suggest that some of the discrete X-ray sources observed by Muno [7] with Chandra in the inner parsec may be such ''fake X-ray binaries''.
DOI Link: 10.1088/1742-6596/54/1/048
ISSN: 1742-6588
eISSN: 1742-6596
Version: Publisher Version
Status: Peer-reviewed
Type: Conference Paper
Rights: Archived with reference to SHERPA/RoMEO and publisher website. Creative Commons Attribution License 3.0
Appears in Collections:Conference Papers & Presentations, Dept. of Physics and Astronomy

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