Chandracentres for COSMOS X-ray galaxy groups: differences in stellar properties between central dominant and offset brightest group galaxies

  title={Chandracentres for COSMOS X-ray galaxy groups: differences in stellar properties between central dominant and offset brightest group galaxies},
  author={Ghassem Gozaliasl and Alexis Finoguenov and Masayuki Tanaka and Klaus Dolag and Francesco Montanari and C C Kirkpatrick and Eleni Vardoulaki and Habib G. Khosroshahi and Mara Salvato and Clotilde Laigle and H. J. McCracken and Olivier Ilbert and Nico Cappelluti and Emanuele Daddi and Guenther Hasinger and Peter Capak and Nicholas Z. Scoville and Sune Toft and Francesca Maria Civano and Richard E Griffiths and Michael Balogh and Yanxia Li and Jussi Ahoranta and Simona Mei and Angela Iovino and Bruno M B Henriques and Ghazaleh Erfanianfar},
  journal={Monthly Notices of the Royal Astronomical Society},
We present the results of a search for galaxy clusters and groups in the ∼2 deg^2 of the COSMOS field using all available X-ray observations from the XMM–Newton and Chandra observatories. We reach an X-ray flux limit of 3×10^(−16) erg cm^(−2)s^(−1) in the 0.5–2 keV range, and identify 247 X-ray groups with M_(200c) = 8×10^(12) -3×10^(14)M⊙ at a redshift range of 0.08 ≤ z < 1.53, using the multiband photometric redshift and the master spectroscopic redshift catalogues of the COSMOS. The X-ray… 
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