Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21720606m&link_type=abstract
American Astronomical Society, AAS Meeting #217, #206.06; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
When a star passes sufficiently close to a massive black hole, it may be torn apart by the tidal forces. The shock heating and subsequent accretion of the stellar debris produces a luminous, super-Eddington flare thought to be brightest at X-ray and ultraviolet wavelengths. Tidal flares and the rate at which they occur provide an unusual probe of the black hole mass distribution function of otherwise inactive galaxies, as well as the populations and dynamics of the nuclei of such galaxies, with implications for galaxy evolution models and gravitational wave detection.
We have examined a number of galaxy clusters using archival observations primarily using XMM-Newton and Chandra and present examples of candidate tidal disruption flares, and discuss our determination of the disruption rate. Although these tidal disruption events are rare (approximately once per galaxy per 104 years), our archival X-ray study of galaxy clusters has allowed us to add to the still relatively small number of known events, constrain the disruption rate, and help set the stage for future wide-field and synoptic searches such as by eRosita and LSST. We have found two such events from our early studies of only two well-sampled clusters. Hence, in our continuing studies of dozens of rich clusters, we anticipate identifying and confirming many more tidal flares. This research will significantly impact our understanding of tidal flares, the rate at which they are produced, and which galaxies produce them.
This research has been by NASA ADP grant NNX08AJ35G.
Eracleous Michael
Maksym Peter
Ulmer Mel
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