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A MULTICOLOR PHOTOMETRIC STUDY OF THE GALAXY CLUSTER A2589: DYNAMICS, LUMINOSITY FUNCTION, AND STAR FORMATION HISTORY
Liu, Shun-Fang1,2; Yuan, Qi-Rong3; Yang, Yan-Bin1; Ma, Jun1; Jiang, Zhao-Ji1; Wu, Jiang-Hua1; Wu, Zhen-Yu1; Chen, Jian-Sheng1; Zhou, Xu1
2011-03-01
Source PublicationASTRONOMICAL JOURNAL
Volume141Issue:3
AbstractSmooth X-ray morphology and non-detection of a radio source at the center of A2589 indicate that it is a typical case of a well-relaxed regular galaxy cluster. In this paper, we present a multicolor photometry for A2589 (z = 0.0414) with 15 intermediate bands in the Beijing-Arizona-Taiwan-Connecticut (BATC) system which covers an optical wavelength range from 3000 angstrom to 10000 angstrom. The spectral energy distributions (SEDs) for more than 5000 sources are achieved down to V similar to 20 mag in about a 1 deg(2) field. A2589 has also been covered by the Sloan Digital Sky Survey (SDSS) in photometric mode only. A cross-identification of the BATC-detected galaxies with the SDSS photometric catalog yields 1199 galaxies brighter than i = 19.5 mag, among which 68 member galaxies with known spectroscopic redshifts are found. After combining the SDSS five-band photometric data and the BATC SEDs, photometric redshift is applied to these galaxies to select faint member galaxies. The color-magnitude relation is taken as a further restriction of early-type cluster galaxies. As a result, 106 galaxies are newly selected as member galaxies. Spatial distribution of member galaxies shows a north-south elongation which agrees with the X-ray brightness profile and the orientation of central cD galaxy, NGC 7647. No substructures are detected on the basis of positions and radial velocities of cluster galaxies, indicating that A2589 is a well-relaxed system. The luminosity function of A2589 exhibits a peak at M-R similar to -20 mag and a dip at M-R similar to -19 mag. The low-density outer regions are the preferred habitat of faint galaxies. With the evolutionary population synthesis model, PEGASE, the environmental effect on the star formation properties for 68 spectroscopically confirmed member galaxies is studied. The outlier faint galaxies tend to have longer timescales of star formation, shorter mean stellar ages, and lower metallicities in the interstellar medium, which can be interpreted in the context of a hierarchical cosmological scenario.
KeywordGalaxies: Clusters: Individual (A2589) Galaxies: Distances And Redshifts Galaxies: Evolution Galaxies: Kinematics And Dynamics Methods: Data Analysis
DOI10.1088/0004-6256/141/3/99
Indexed BySCI
Language英语
WOS IDWOS:000287231000030
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7932
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
3.Nanjing Normal Univ, Dept Phys, Nanjing, Peoples R China
Recommended Citation
GB/T 7714
Liu, Shun-Fang,Yuan, Qi-Rong,Yang, Yan-Bin,et al. A MULTICOLOR PHOTOMETRIC STUDY OF THE GALAXY CLUSTER A2589: DYNAMICS, LUMINOSITY FUNCTION, AND STAR FORMATION HISTORY[J]. ASTRONOMICAL JOURNAL,2011,141(3).
APA Liu, Shun-Fang.,Yuan, Qi-Rong.,Yang, Yan-Bin.,Ma, Jun.,Jiang, Zhao-Ji.,...&Zhou, Xu.(2011).A MULTICOLOR PHOTOMETRIC STUDY OF THE GALAXY CLUSTER A2589: DYNAMICS, LUMINOSITY FUNCTION, AND STAR FORMATION HISTORY.ASTRONOMICAL JOURNAL,141(3).
MLA Liu, Shun-Fang,et al."A MULTICOLOR PHOTOMETRIC STUDY OF THE GALAXY CLUSTER A2589: DYNAMICS, LUMINOSITY FUNCTION, AND STAR FORMATION HISTORY".ASTRONOMICAL JOURNAL 141.3(2011).
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