J/ApJ/734/68 High redshift galaxy clusters in deep fields (Wen+, 2011)
Galaxy clusters at high redshift and evolution of brightest cluster galaxies.
Wen Z.L., Han J.L.
<Astrophys. J., 734, 68 (2011)>
=2011ApJ...734...68W 2011ApJ...734...68W
ADC_Keywords: Clusters, galaxy ; Surveys ; Redshifts
Keywords: galaxies: clusters: general -
galaxies: elliptical and lenticular, cD - galaxies: evolution
Abstract:
Identification of high-redshift clusters is important for studies of
cosmology and cluster evolution. Using photometric redshifts of
galaxies, we identify 631 clusters from the Canada-France-Hawaii
Telescope (CFHT) wide field, 202 clusters from the CFHT deep field,
187 clusters from the Cosmic Evolution Survey (COSMOS) field, and 737
clusters from the Spitzer Wide-area InfraRed Extragalactic Survey
(SWIRE) field. The redshifts of these clusters are in the range
0.1≲z≲1.6. Merging these cluster samples gives 1644 clusters in the
four survey fields, of which 1088 are newly identified and more than
half are from the large SWIRE field. Among 228 clusters of z≥1, 191
clusters are newly identified, and most of them from the SWIRE field.
With this large sample of high-redshift clusters, we study the color
evolution of the brightest cluster galaxies (BCGs).
Description:
The CFHT survey is carried out with the 3.6m CFHT in the u', g',
r', i', and z' bands for three imaging sub-surveys: the CFHT
Deep Survey, the CFHT Wide Survey, and the CFHT Very Wide Survey. The
photo-z data of the deep and wide fields have been published and used
in previous works (see references in Section 1.1). The CFHT wide
survey covers 35deg2 in three deep fields (W1, W3, W4). The CFHT Deep
survey covers 3.2deg2 in four deep fields (D1, D2, D3, D4).
COSMOS is formed from a field of 2deg2 by many observations from
X-ray to radio (XMM, Galaxy Evolution Explorer, Hubble Space
Telescope, CFHT, United Kingdom Infrared Telescope, Subaru, Spitzer,
and Very Large Array).
Spitzer SWIRE provides photometry (Lonsdale et al.
2003PASP..115..897L 2003PASP..115..897L) in the IRAC bands of 3.6um, 4.5um, 5.8um, and
8.0um and MIPS bands of 24um, 70um, and 160um for six regions
(ELAIS-N1, ELAIS-N2, Lockman Hole, XMM, ELAIS-S1, and the Chandra Deep
Field South (CDFS)). The photometries in optical bands u, g, r, i, and
z (the band only here, not the redshift) are available from the SWIRE
photometry program and from McMahon et al. (2001NewAR..45...97M 2001NewAR..45...97M) and
Pierre et al. (2007, Cat. J/MNRAS/382/279).
Detailed parameters for the four fields are given in Table 1,
including the field size, magnitude limit, number of bands for
photometry, and the accuracy of photo-z :
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Name Field l_mag e_z No. r_zph NCl NnewCl Nhz Nnewhz
(deg2) Bands
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CFHT Wide 35.0 i'<22.5 0.038 5 1 631 285 24 19
CFHT Deep 3.2 i'<24 0.029 5 1,2 202 55 53 29
COSMOS 2.0 i+<25 0.012 30 3 187 127 43 38
SWIRE 33.0 r<24 0.035 5-12 4 737 674 116 106
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References for photo-z: (1) Coupon et al. 2009A&A...500..981C 2009A&A...500..981C;
(2) Ilbert et al. 2006A&A...457..841I 2006A&A...457..841I; (3) Ilbert et al. 2009ApJ...690.1236I 2009ApJ...690.1236I;
(4) Rowan-Robinson et al. (2008, Cat. II/290). Here, high-z (hz) means z≥1.
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 93 1757 Clusters identified from the four deep fields
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See also:
II/290 : SWIRE Photometric Redshift Catalogue (Rowan-Robinson+, 2008)
J/A+A/509/A81 : Candidate clusters detected in CFHTLS fields (Adami+, 2010)
J/ApJS/189/270 : MUSYC optical imaging in ECDF-S (Cardamone+, 2010)
J/MNRAS/394/375 : AKARI photometric redshift accuracy (Negrello+, 2009)
J/A+A/494/845 : Galaxy clusters in the CFHTLS (Grove+, 2009)
J/ApJS/183/197 : Galaxy clusters identified from the SDSS-DR6 (Wen+, 2009)
J/ApJS/172/182 : XMM Clusters of galaxies in COSMOS field (Finoguenov+ 2007)
J/MNRAS/382/279 : XMM-LSS catalogue. Version I. (Pierre+, 2007)
J/A+A/461/81 : Galaxy clusters in the CFHTLS (Olsen+, 2007)
J/AJ/132/926 : Galaxies in the Hubble Ultra Deep Field (Coe+, 2006)
J/ApJS/158/161 : Photometric redshift catalog from the RCS (Hsieh+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Field Field name (CFHT-W, CFHT-D, COSMOS, SWIRE) (1)
8- 23 A16 --- Name Source name (JHHMMSS.s+DDMMSS) (1)
25- 33 F9.5 deg RAdeg BCG Right Ascension in decimal degrees (J2000)
35- 43 F9.5 deg DEdeg BCG Declination in decimal degrees (J2000)
45- 50 F6.4 --- zp [0.1518/1.6203] Estimated cluster redshift (2)
52- 58 F7.4 --- zs ?=-1 BCG spectroscopic redshift
60- 64 F5.2 mag mag [16.03/25.72]?=-9.99 BCG AB magnitude (3)
66- 70 F5.2 --- D [4/21.5] Overdensity level
72- 73 I2 --- Ngal [8/83] Number of member galaxy candidates (4)
75- 79 F5.2 --- R [0.3/66] Cluster richness
81- 86 F6.2 10+10Lsun Ltot [0.8/930] Total cluster luminosity (5)
88- 93 A6 --- Cat [1-7, ] Previous catalog(s) containing the
cluster (6)
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Note (1): Same clusters found in different fields are repeatedly listed here
for completeness with the same BCG coordinates. Cluster name given
by field name and J2000 coordinates of cluster center.
Note (2): Estimated from the median photo-z of member galaxies.
Note (3): i'-band (7629 Angstroms) for the CFHT-W and CFHT-D fields,
i±band (7629 Angstroms) for the COSMOS field, and
r-band (6230 Angstroms) for the SWIRE field.
Note (4): Within a radius of 1Mpc and the redshift gap of
z±1.44σΔz. See σΔz (e_z) in Table 1.
Note (5): After the local background is subtracted. It is in the i'-band for
the CFHT-W and CFHT-D fields, V-band for the COSMOS field, B-band
for the SWIRE field.
Note (6): Previous catalogs as follows:
1 = Thanjavur et al. (2009ApJ...706..571T 2009ApJ...706..571T);
2 = Adami et al. (2010, Cat. J/A+A/509/A81);
3 = Olsen et al. (2007, Cat. J/A+A/461/81);
4 = Grove et al. (2009, Cat. J/A+A/494/845);
5 = Milkeraitis et al. (2010MNRAS.406..673M 2010MNRAS.406..673M);
6 = Finoguenov et al. (2007, Cat. J/ApJS/172/182) for X-ray;
7 = Pierre et al. (2007, Cat. J/MNRAS/382/279) for X-ray.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-Nov-2012