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J/ApJS/176/414 Galaxy clusters in the SDSS-DR5 (Yoon+, 2008)
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Beginning of ReadMe :J/ApJS/176/414 Galaxy clusters in the SDSS-DR5 (Yoon+, 2008)
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A spectrophotometric search for galaxy clusters in SDSS.
Yoon J.H., Schawinski K., Sheen Y.-K., Ree C.H., Yi S.K.
<Astrophys. J. Suppl. Ser., 176, 414-423 (2008)>
=2008ApJS..176..414Y
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ADC_Keywords: Clusters, galaxy ; Spectrophotometry
Keywords: catalogs - galaxies: clusters: general - galaxies: general - surveys
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.