J/ApJS/176/414 Galaxy clusters in the SDSS-DR5 (Yoon+, 2008)
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 2008ApJS..176..414Y
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.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 101 924 Cluster catalog with maximum density ρ≥4
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See also:
J/AJ/123/1807 : SDSS galaxy clusters redshifts (Goto+, 2002)
J/ApJS/148/243 : Catalog of clusters of galaxies from SDSS (Bahcall+, 2003)
J/ApJS/167/1 : Galaxy groups and clusters from SDSS (Berlind+, 2006)
J/A+A/479/927 : Group of galaxies in SDSS 5 (Tago+, 2008)
J/MNRAS/392/135 : Galaxy clusters from SDSS (Lopes+, 2009)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [YSS2008] Running identification number
5- 13 F9.5 deg RAdeg MDG Right Ascension (J2000) (1)
15- 23 F9.5 deg DEdeg MDG Declination (J2000) (1)
25- 31 F7.5 --- z Cluster redshift from spectroscopic data
33- 38 F6.3 --- rho Cluster maximum-density galaxy density
within 1Mpc
40- 42 I3 --- N200 Number of galaxies of clusters within R200
44- 48 F5.3 Mpc R200 Virial radius of clusters (2)
50- 53 I4 km/s sigV Velocity dispersion within R200
55- 63 F9.5 deg RA(BCG) BCG Right Ascension (J2000) (3)
65- 73 F9.5 deg DE(BCG) BCG Declination (J2000) (3)
75- 81 F7.5 --- z(BCG) ?=0.00000 Brightest-cluster galaxy redshift
83-101 A19 --- ONames Known galaxy cluster match
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Note (1): Position of the maximum-density galaxies (MDGs), in decimal degrees.
Note (2): Obtained by the number density profile of the galaxy clusters;
Note (3): Position of the brightest-cluster galaxies (BCGs), in decimal degrees.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Jul-2009