Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-12-07
Astronomy and Astrophysics
Astrophysics
Web-page address has been revised and minor corrections are done
Scientific paper
10.1086/528958
Recent large-scale galaxy spectroscopic surveys, such as the Sloan Digital Sky Survey (SDSS), enable us to execute a systematic, relatively-unbiased search for galaxy clusters. Such surveys make it possible to measure the 3-d distribution of galaxies but are hampered by the incompleteness problem due to fiber collisions. In this study we aim to develop a density measuring technique that alleviates the problem and derives densities more accurately by adding additional cluster member galaxies that follow optical color-magnitude relations for the given redshift. The new density measured with both spectroscopic and photometric data shows a good agreement with apparent information on cluster images and is supported by follow-up observations. By adopting this new method, a total of 924 $robust$ galaxy clusters are found from the SDSS DR5 database in the redshift range $0.05
Ree Chang H.
Schawinski Kevin
Sheen Yun-Kyeong
Yi Sukyoung K.
Yoon Joo H.
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