Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.1511k&link_type=abstract
American Astronomical Society, HEAD Meeting #5, #15.11; Bulletin of the American Astronomical Society, Vol. 32, p.1204
Astronomy and Astrophysics
Astronomy
Scientific paper
We have analyzed early Chandra High Resolution Camera observations of the starburst galaxy M82, concentrating on the most luminous x-ray source. We find an accurate position and report detection of an x-ray oscillation with a period in the range 573--613 s. The x-ray position shows that the luminous source is not at the dynamical center of M82 or coincident with any suggested radio AGN candidate. The detection of ~ 600 s oscillations excludes the possibility that the source is a supernova or remnant, suggests that the source is a compact object, and can be used to place an upper bound of 1.3 x 106 Msun on the mass of the compact object. The x-ray luminosity suggests a compact object mass in excess of 600 Msun. Thus, the luminous source in M82 likely represents a new class of compact object with a mass intermediate between those of stellar mass black hole candidates and supermassive black holes found in the centers of galaxies.
Kaaret Phil
Kilgard Roy E.
Kim Dae Wook
Murray Stephen S.
Prestwich Andrea H.
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