A Runaway Black Hole in COSMOS: Gravitational Wave or Slingshot Recoil?

  title={A Runaway Black Hole in COSMOS: Gravitational Wave or Slingshot Recoil?},
  author={Francesca Maria Civano and Martin Elvis and Giorgio Lanzuisi and Knud Jahnke and Gianni Zamorani and Laura Blecha and Angelo Bongiorno and Marcella Brusa and Andrea Comastri and Heng Hao and Alexie Leauthaud and Abraham Loeb and Marco Mignoli and Vincenzo Mainieri and Enrico Piconcelli and Mara Salvato and Nicholas Scoville and Jonathan R. Trump and Cristian Vignali and Thomas Lytell Aldcroft and Micol Bolzonella and Eli Bressert and Alexis Finoguenov and Antonella Fruscione and Anton M. Koekemoer and Nico Cappelluti and Fabrizio Fiore and Stefania Giodini and Roberto Gilli and Christopher Impey and Simon J. Lilly and Elisabeta Lusso and Simonetta Puccetti and John D. Silverman and H. Aussel and Peter Capak and David T. Frayer and Emeric Le Floc’h and H. J. Mccracken and David B. Sanders and David Schiminovich and Y. Taniguchi Harvard Smithsonian Center for astrophysics and Universita di RomaLa Sapienza'' and Max-Planck-Institut fur Astronomie and Heidelberg and INAF-Osservatorio astronomico di Bologna and Harvard University and Mpe Garching and Lbnl and University of Southern California and Eso - Garching and INAF-Osservatorio Astronomico di Roma and California Institute of Technology. and University of Arizona and Universita' di Bologna and Space Telescope Science Institute and Eth and Asi Science Data Center and A Cnrs and University of Hawaii and Institut d'Astrophysique de Paris and Columbia University and Ehime University},
  journal={The Astrophysical Journal},
We present a detailed study of a peculiar source detected in the COSMOS survey at z = 0.359. Source CXOC J100043.1+020637, also known as CID-42, has two compact optical sources embedded in the same galaxy. The distance between the two, measured in the HST/ACS image, is 0."495 ± 0."005 that, at the redshift of the source, corresponds to a projected separation of 2.46 ± 0.02 kpc. A large (~1200 km s^(−1)) velocity offset between the narrow and broad components of Hβ has been measured in three… Expand

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