Abstract
We show that a 10-yr Gaia mission could astrometrically detect the orbital motion of subparsec separation supermassive black hole binary in the heart of nearby, bright active galactic nuclei (AGN). Candidate AGN lie out to a redshift of and in the V-band magnitude range . The distribution of detectable binary masses peaks at a few times and is truncated above a few times .
- Received 7 September 2018
DOI:https://doi.org/10.1103/PhysRevD.100.103016
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