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Photometry and Spectroscopy of i-drop Galaxies: Possible Detection of A Proto-cluster at z=6†

Published online by Cambridge University Press:  01 August 2006

Kazuaki Ota
Kazuaki Ota*
Affiliation:
Dept. of Astronomy, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan email: ota@optik.mtk.nao.ac.jp
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Abstract

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We discovered 30 candidate galaxies are clustering in a small ~200 Mpc2 region at z = 6 with 5σ local density excess in a wide 876 arcmin2 field. Four of them were spectroscopically identified as z = 5.9–6.0 Lyα emitters (~34 Mpc in line-of-sight). This structure is comparable to z = 4.8 and 5.7 galaxy proto-clusters previously found. Since the other candidates are likely to be real galaxies due to low sample contamination, the overdensity can be a z~6 proto-cluster.

Keywords

galaxies: high-redshiftcosmology: observationslarge-scale structure of universe

References

Ota, K., Kashikawa, N., Nakajima, T., Iye, M. 2005, JKAS 38, 179Google Scholar
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