PROTO-GROUPS AT 1.8 < z < 3 IN THE zCOSMOS-DEEP SAMPLE

@article{Diener2013PROTOGROUPSA1,
  title={PROTO-GROUPS AT 1.8 < z < 3 IN THE zCOSMOS-DEEP SAMPLE},
  author={Catrina Diener and Simon J. Lilly and Christian Knobel and Giovanni Zamorani and Gerard Lemson and P. Kampczyk and Nicholas Z. Scoville and C. Marcella Carollo and Thierry Contini and Jean-Paul Kneib and Olivier Le F{\`e}vre and Vincenzo Mainieri and Alvio Renzini and Marco Scodeggio and Sandro Bardelli and Micol Bolzonella and Angelo Bongiorno and Karina I. Caputi and Olga Cucciati and Sylvain de la Torre and Loic de Ravel and Paolo Franzetti and Bianca Garilli and Angela Iovino and K. Kovavc and Fabrice Lamareille and J. F. Le Borgne and Vincent Le Brun and Christian Maier and Marco Mignoli and Roser Pell{\'o} and Y. Peng and Enrique P{\'e}rez Montero and Valentina Presotto and John D. Silverman and M. Tanaka and Lidia A. M. Tasca and Laurence Tresse and D. Vergani and Elena Zucca and Rongmon Bordoloi and Alberto Cappi and Andrea Cimatti and Graziano Coppa and Anton M. Koekemoer and Carlos L'opez-Sanjuan and Henry Joy McCracken and M. Moresco and Preethi Nair and Lucia Pozzetti and Niraj Welikala},
  journal={The Astrophysical Journal},
  year={2013},
  volume={765}
}
We identify 42 “candidate groups” lying between 1.8 < z < 3.0 from a sample of 3502 galaxies with spectroscopic redshifts in the zCOSMOS-deep redshift survey within this same redshift interval. These systems contain three to five spectroscopic galaxies that lie within 500 kpc in projected distance (in physical space) and within 700 km s−1 in velocity. Based on extensive analysis of mock catalogs that have been generated from the Millennium simulation, we examine the likely nature of these… 
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