A spectrophotometric search for galaxy clusters in SDSS

Joo H. Yoon, Kevin Schawinski, Yun Kyeong Sheen, Chang H. Ree, K. Y.I. Sukyoung

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

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 3D 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 < z < 0.1, of which 212 are new. Local maximum-density galaxies successfully represent cluster centers. We provide the cluster catalog including a number of cluster parameters.

Original languageEnglish
Pages (from-to)414-423
Number of pages10
JournalAstrophysical Journal, Supplement Series
Volume176
Issue number2
DOIs
Publication statusPublished - 2008 Jun 1

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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