A Periodically Varying Luminous Quasar at z=2 from the Pan-STARRS1 Medium Deep Survey: A Candidate Supermassive Black Hole Binary in the Gravitational Wave-Driven Regime

@article{Liu2015APV,
  title={A Periodically Varying Luminous Quasar at z=2 from the Pan-STARRS1 Medium Deep Survey: A Candidate Supermassive Black Hole Binary in the Gravitational Wave-Driven Regime},
  author={Tingting Liu and S. Gezari and S. Heinis and E. Magnier and W. Burgett and K. Chambers and H. Flewelling and M. Huber and K. Hodapp and N. Kaiser and R. Kudritzki and J. Tonry and R. Wainscoat and C. W. U. O. Maryland and U. Hawaii and Gmto Corporation},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2015}
}
Supermassive black hole binaries (SMBHBs) should be an inevitable consequence of the hierarchical growth of massive galaxies through mergers, and the strongest sirens of gravitational waves (GWs) in the cosmos. And yet, their direct detection has remained elusive due to the compact (sub-parsec) orbital separations of gravitationally bound SMBHBs. Here we exploit a theoretically predicted signature of a SMBHB in the time domain: periodic variability caused by a mass accretion rate that is… Expand
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