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J/ApJ/697/1842 zCOSMOS 10K sample group catalog to z=1 (Knobel+, 2009)
The following files can be converted to FITS (extension .fit or fit.gz)
table3.dat table4.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/697/1842
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-r--r--r-- 1 cats archive 37701 Jun 3 2011 table3.dat [txt] [txt.gz] [fits] [fits.gz] [html]
-r--r--r-- 1 cats archive 90090 Jun 3 2011 table4.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe :J/ApJ/697/1842 zCOSMOS 10K sample group catalog to z=1 (Knobel+, 2009)
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An optical group catalog to z = 1 from the zCOSMOS 10 K sample.
Knobel C., Lilly S.J., Iovino A., Porciani C., Kovac K., Cucciati O.,
Finoguenov A., Kitzbichler M.G., Carollo C.M., Contini T., Kneib J.-P.,
Le Fevre O., Mainieri V., Renzini A., Scodeggio M., Zamorani G.,
Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G.,
de la Torre S., de Ravel L., Franzetti P., Garilli B., Kampczyk P.,
Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pello R.,
Peng Y., Montero E.P., Ricciardelli E., Silverman J.D., Tanaka M.,
Tasca L., Tresse L., Vergani D., Zucca E., Abbas U., Bottini D., Cappi A.,
Cassata P., Cimatti A., Fumana M., Guzzo L., Koekemoer A.M., Leauthaud A.,
Maccagni D., Marinoni C., McCracken H.J., Memeo P., Meneux B., Oesch P.,
Pozzetti L., Scaramella R.
<Astrophys. J., 697, 1842-1860 (2009)>
=2009ApJ...697.1842K
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ADC_Keywords: Galaxy catalogs ; Redshifts
Keywords: catalogs - galaxies: clusters: general - galaxies: high-redshift -
methods: data analysis
Abstract:
We present a galaxy group catalog spanning the redshift range
0.1< z< 1 in the 1.7deg^2^ COSMOS field, based on the first 10000
zCOSMOS spectra. The performance of both the Friends-of-Friends (FOF)
and Voronoi-Delaunay method (VDM) approaches to group identification
has been extensively explored and compared using realistic mock
catalogs. We find that the performance improves substantially if
groups are found by progressively optimizing the group-finding
parameters for successively smaller groups, and that the highest
fidelity catalog, in terms of completeness and purity, is obtained by
combining the independently created FOF and VDM catalogs. The final
completeness and purity of this catalog, both in terms of the groups
and of individual members, compares favorably with recent results in
the literature. The current group catalog contains 102 groups with
N>=5 spectroscopically confirmed members, with a further 700 groups
with 2<=N<=4. Most of the groups can be assigned a velocity dispersion
and a dark-matter mass derived from the mock catalogs, with
quantifiable uncertainties. The fraction of zCOSMOS galaxies in groups
is about 25% at low redshift and decreases toward 15% at z 0.8. The
zCOSMOS group catalog is broadly consistent with that expected from
the semianalytic evolution model underlying the mock catalogs.
Description:
zCOSMOS is a spectroscopic redshift survey (Lilly et al. 2007, cat.
J/ApJS/172/70; S. J. Lilly et al. 2009, Cat. J/ApJS/184/218) covering
the 1.7 deg2 COSMOS field (Scoville et al. 2007ApJS..172....1S). The
redshifts are measured with the VLT using the VIMOS spectrograph. The
mocks we use to calibrate and test our groupfinders are adapted from
the COSMOS mock light cones (Kitzbichler & White 2007MNRAS.376....2K).