Mathematics – Logic
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21740404t&link_type=abstract
American Astronomical Society, AAS Meeting #217, #404.04; Bulletin of the American Astronomical Society, Vol. 43, 2011
Mathematics
Logic
Scientific paper
Supermassive black hole binaries are expected to form and coalesce throughout cosmic time. The prospects of detecting a merger of two supermassive black holes have never been better. Recent breakthroughs in numerical relativity have made possible precise predictions for the gravitational-wave signature of coalescence; and the planned space-based detector LISA is expected to measure this signature with extremely high fidelity. If the coalescence event also has a detectable electromagnetic signature, e.g. from the interaction of the rapidly merging binary with the surrounding gas, then identifying this emission together with the gravitational-wave observation will allow cosmological studies by identifying the source redshift. Such a concomitant observation would also present a unique opportunity to study the accretion flows around black holes whose masses and spins are precisely known. I will discuss a simple thin-disk model for the co-evolution of the binary and the circumbinary gas disk, and describe the time-dependent features of the emission that could help distinguish such merging or recently merged binary systems from AGN and quasars fueled by a solitary black hole.
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