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GALAXY CLUSTERS AT HIGH REDSHIFT AND EVOLUTION OF BRIGHTEST CLUSTER GALAXIES
Wen, Z. L.; Han, J. L.
2011-06-10
Source PublicationASTROPHYSICAL JOURNAL
Volume734Issue:1
AbstractIdentification 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 less than or similar to z less than or similar to 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). The r' - z' and r(+) - m(3.6 mu m) colors of the BCGs are consistent with a stellar population synthesis model in which the BCGs are formed at redshift z(f) >= 2 and evolved passively. The g' - z' and B - m(3.6 mu m) colors of the BCGs at redshifts z > 0.8 are systematically bluer than the passive evolution model for galaxies formed at z(f) similar to 2, indicating star formation in high-redshift BCGs.
KeywordGalaxies: Clusters: General Galaxies: Evolution Galaxies: Elliptical And Lenticular Cd
DOI10.1088/0004-637X/734/1/68
Indexed BySCI
Language英语
WOS IDWOS:000291026900068
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7831
Collection射电天文研究部
AffiliationChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Wen, Z. L.,Han, J. L.. GALAXY CLUSTERS AT HIGH REDSHIFT AND EVOLUTION OF BRIGHTEST CLUSTER GALAXIES[J]. ASTROPHYSICAL JOURNAL,2011,734(1).
APA Wen, Z. L.,&Han, J. L..(2011).GALAXY CLUSTERS AT HIGH REDSHIFT AND EVOLUTION OF BRIGHTEST CLUSTER GALAXIES.ASTROPHYSICAL JOURNAL,734(1).
MLA Wen, Z. L.,et al."GALAXY CLUSTERS AT HIGH REDSHIFT AND EVOLUTION OF BRIGHTEST CLUSTER GALAXIES".ASTROPHYSICAL JOURNAL 734.1(2011).
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