Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.1505l&link_type=abstract
American Astronomical Society, AAS Meeting #212, #15.05; Bulletin of the American Astronomical Society, Vol. 40, p.209
Astronomy and Astrophysics
Astronomy
Scientific paper
Coalescences of compact objects with supermassive black holes (SMBHs) are expected to be one of the most significant sources of gravity waves for the NASA/ESA mission LISA (Laser Interferometer Space Antenna). One very tantalizing source for this mission would be binary SMBH mergers, a coalescence of galactic systems containing two SMBHs. If all galaxies have SMBHs near their centers, given the rate of galaxy mergers, it seems likely that binary SMBH systems are quite common in the universe, since, once the two galaxies have merged, dynamical friction would cause the two SMBHs to settle to the center of the new stellar distribution. Binarity among stars is the rule - most stars are binary or multiple stars - so it would be a great surprise if binary SMBH were not also common. Preliminary work does show that they are likely to be rather common among a particular class of galaxy - starburst-AGNs. We present Chandra X-ray images of possible binary SMBHs and their host galaxies, and discuss the additional observations needed to confirm them as binary SMBHs.
Kennefick Daniel
Kennefick Julia
Lacy Claud H.
Seigar Marc
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