Varstrometry for Off-nucleus and Dual Subkiloparsec AGN (VODKA): Hubble Space Telescope Discovers Double Quasars

@article{Chen2022VarstrometryFO,
  title={Varstrometry for Off-nucleus and Dual Subkiloparsec AGN (VODKA): Hubble Space Telescope Discovers Double Quasars},
  author={Yu-Ching Chen and Hsiang-Chih Hwang and Yue Shen and Xin Liu and Nadia L. Zakamska and Qian Yang and Jennifer I-Hsiu Li},
  journal={The Astrophysical Journal},
  year={2022},
  volume={925}
}
Dual supermassive black holes (SMBHs) at ∼kiloparsec scales are the progenitor population of SMBH mergers and play an important role in understanding the pairing and dynamical evolution of massive black holes in galaxy mergers. Because of the stringent resolution requirement and the apparent rareness of these small-separation pairs, there are scarce observational constraints on this population, with few confirmed dual SMBHs at <10 kpc separations at z > 1. Here we present results from a pilot… 

SQUAB—I: The First Release of Strange QUasar Candidates With ABnormal Astrometric Characteristics From Gaia EDR3 and SDSS

Given their extremely large distances and small apparent sizes, quasars are generally considered as objects with near-zero parallax and proper motion. However, some special quasars may have abnormal

Unveiling the population of dual- and lensed- AGNs at sub-arcsec separations with Gaia

1INAF Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125, Firenze, Italy email: filippo.mannucci@inaf.it 2Space Science Data Center – ASI, Via del Politecnico SNC, I-00133 Roma, Italy

A Close Quasar Pair in a Disk-Disk Galaxy Merger at z = 2.17

1Department of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA 2National Center for Supercomputing Applications, University of Illinois at UrbanaChampaign, 605 East

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