Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21810708t&link_type=abstract
American Astronomical Society, AAS Meeting #218, #107.08; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Pulsar Timing Arrays (PTAs) are expected to detect the collective gravitational-wave (GW) nanohertz background emitted by the population of compact supermassive black hole (SMBH) binaries in our cosmic neighborhood. Recent studies have suggested that: (i) the most massive or nearby sources may stick out above the background and be individually resolved; and (ii) PTAs may be able to constrain the sky positions and luminosity distances of resolved systems. We present a semianalytic toy model for accretion disks around such SMBH binaries. This model predicts thermal emission properties that differ from standard disk models around solitary SMBHs and thus may aid the electromagnetic identification of resolved PTA sources. Successful multi-messenger observations of these objects would complement cosmic expansion studies that utilize type-Ia supernovae, and allow follow-up astronomical studies of nearby SMBH binaries.
Haiman Zoltan
Menou Kristen
Tanaka Takamitsu
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