Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003newar..47..339k&link_type=abstract
New Astronomy Reviews, Volume 47, Issue 4-5, p. 339-342.
Astronomy and Astrophysics
Astronomy
7
Scientific paper
The powerful radio galaxy PKS 1138-262 is a massive galaxy in a dense environment as indicated by optical, NIR, radio and X-ray observations. We have found an overdensity of Ly/α emitters within 1.5 Mpc of the radio galaxy which form a proto cluster at /z=2.2. We have also found numerous candidate H/α emitters near 1138-262. The surface density of H/α candidates increases towards the radio galaxy, contrary to the density of Ly/α candidates. We have spectroscopically confirmed the identification of nine H/α candidates whose velocity dispersion is smaller than for the Ly/α emitting sample. The field of 1138-262 also contains a high density of EROs and X-ray emitters. We will discuss the implications of these measurements and show that there are several galaxy populations present in the proto cluster.
Kurk Jaron
Miley George
Overzier Roderik
Pentericci Laura
Rottgering Huub
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