dc.contributor.author | Garcia, M. R. | |
dc.contributor.author | Hextall, Richard | |
dc.contributor.author | Galache, Jose | |
dc.contributor.author | Melia, Fulvio | |
dc.contributor.author | Murray, Stephen S. | |
dc.contributor.author | Primini, F. A. | |
dc.contributor.author | Sjouwerman, Loránt O. | |
dc.contributor.author | Williams, Ben | |
dc.contributor.author | Baganoff, Frederick K | |
dc.date.accessioned | 2015-03-19T19:26:08Z | |
dc.date.available | 2015-03-19T19:26:08Z | |
dc.date.issued | 2010-02 | |
dc.date.submitted | 2009-07 | |
dc.identifier.issn | 0004-637X | |
dc.identifier.issn | 1538-4357 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/96091 | |
dc.description.abstract | 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 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[superscript –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. | en_US |
dc.description.sponsorship | Chandra X-ray Center (U.S.) (Contract NAS8-03060) | en_US |
dc.description.sponsorship | Chandra X-ray Center (U.S.) (Chandra grant GO-6088A) | en_US |
dc.language.iso | en_US | |
dc.publisher | Institute of Physics/American Astronomical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1088/0004-637x/710/1/755 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | American Astronomical Society | en_US |
dc.title | X-RAY AND RADIO VARIABILITY OF M31*, THE ANDROMEDA GALAXY NUCLEAR SUPERMASSIVE BLACK HOLE | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Garcia, Michael R., Richard Hextall, Frederick K. Baganoff, Jose Galache, Fulvio Melia, Stephen S. Murray, F. A. Primini, Loránt O. Sjouwerman, and Ben Williams. “X-RAY AND RADIO VARIABILITY OF M31*, THE ANDROMEDA GALAXY NUCLEAR SUPERMASSIVE BLACK HOLE.” The Astrophysical Journal 710, no. 1 (January 21, 2010): 755–763. © 2009 American Astronomical Society. | en_US |
dc.contributor.department | MIT Kavli Institute for Astrophysics and Space Research | en_US |
dc.contributor.mitauthor | Baganoff, Frederick K. | en_US |
dc.relation.journal | Astrophysical Journal | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Garcia, Michael R.; Hextall, Richard; Baganoff, Frederick K.; Galache, Jose; Melia, Fulvio; Murray, Stephen S.; Primini, F. A.; Sjouwerman, Loránt O.; Williams, Ben | en_US |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |