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Multicolor Photometry of the Galaxies in Abell 1775: Substructures, Luminosity Functions, and Star-Formation Properties
Zhang, Li1; Yuan, Qirong1; Yang, Qian2; Zhang, Shiyan1; Li, Feng3; Zhou, Xu4; Jiang, Zhaoji4
2011
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
卷号63期号:3页码:585-599
摘要An optical photometric observation in 15 bands was carried out for the nearby galaxy cluster Abell 1775 (A 1775) by the Beijing-Arizona-Taiwan-Connecticut (BATC) multi-color system. Over 5000 sources' spectral energy distributions (SEDs) were obtained. Since this cluster has also been observed by the Sloan Digital Sky Survey (SDSS), the BATC SEDs were combined with the SDSS five-band photometric data. Using the combined SEDs, 146 faint galaxies were selected as new member galaxies by the photometric redshift technique. Based on the positions, redshifts, and 20-band SEDs of member galaxies, dynamical substructures and luminosity functions (LFs) of A 1775 were investigated. The previous reported bimodal structure of A 1775 has been confirmed: a poor subcluster with lower redshift, A 1775 A, is located similar to 14' southeast to the main concentration, A 1775 B. After taking into account the new supplemented member galaxies, a new subcluster, A 1775 C, was found along the aligned direction of A 1775 A and A 1775 B. The different LF faint ends of the two subclusters indicate that A 1775 B is a more dynamically evolved system, while A 1775 A is still dynamically young. By using the STARLIGHT spectral synthesis code, the star-formation histories of the member galaxies were studied. The dependence of the mean stellar ages upon the Hubble type was confirmed, and the environmental effect on star-formation activities for galaxies in A 1775 B has been explored.
关键词Galaxies: Clusters: Individual (Abell 1775) Galaxies: Distances And Redshifts Galaxies: Kinematics And Dynamics Galaxies: Luminosity Function Stars: Formation
收录类别SCI
语种英语
WOS记录号WOS:000292623400012
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7928
专题光学天文研究部
作者单位1.Nanjing Normal Univ, Dept Phys, Nanjing 210046, Peoples R China
2.Qingdao Univ, Qingdao 266071, Peoples R China
3.Jiangsu Ind Coll, Changzhou 213144, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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Zhang, Li,Yuan, Qirong,Yang, Qian,et al. Multicolor Photometry of the Galaxies in Abell 1775: Substructures, Luminosity Functions, and Star-Formation Properties[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2011,63(3):585-599.
APA Zhang, Li.,Yuan, Qirong.,Yang, Qian.,Zhang, Shiyan.,Li, Feng.,...&Jiang, Zhaoji.(2011).Multicolor Photometry of the Galaxies in Abell 1775: Substructures, Luminosity Functions, and Star-Formation Properties.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,63(3),585-599.
MLA Zhang, Li,et al."Multicolor Photometry of the Galaxies in Abell 1775: Substructures, Luminosity Functions, and Star-Formation Properties".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 63.3(2011):585-599.
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