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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
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
Volume63Issue:3Pages:585-599
AbstractAn 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.
KeywordGalaxies: Clusters: Individual (Abell 1775) Galaxies: Distances And Redshifts Galaxies: Kinematics And Dynamics Galaxies: Luminosity Function Stars: Formation
Indexed BySCI
Language英语
WOS IDWOS:000292623400012
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7928
Collection光学天文研究部
Affiliation1.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
Recommended Citation
GB/T 7714
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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