Galaxy Evolution in Overdense Environments at High Redshift: Passive Early-type Galaxies in a Cluster at z ~ 2

  title={Galaxy Evolution in Overdense Environments at High Redshift: Passive Early-type Galaxies in a Cluster at z ~ 2},
  author={Veronica Strazzullo and Raphael Gobat and Emanuele Daddi and Masato Onodera and Marcella Carollo and Mark E. Dickinson and Alvio Renzini and Nobuo Arimoto and Andrea Cimatti and Alexis Finoguenov and Ranga-Ram Chary},
  journal={The Astrophysical Journal},
We present a study of galaxy populations in the central region of the IRAC-selected, X-ray-detected galaxy cluster Cl J1449+0856 at z = 2. Based on a sample of spectroscopic and photometric cluster members, we investigate stellar populations and the morphological structure of cluster galaxies over an area of ~0.7 Mpc^2 around the cluster core. The cluster stands out as a clear overdensity both in redshift space and in the spatial distribution of galaxies close to the center of the extended X… 
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