Multicolor photometry of the galaxy cluster A98: substructures and star formation properties
Multicolor photometry of the galaxy cluster A98: substructures and star formation properties
复制标题
星系团 A98 的多色光度测量:子结构和恒星形成特性
DOI:
10.1088/1674-4527/10/1/001
复制
发表时间:
2009-09
影响因子:
1.8
通讯作者:
Wu, Jiang-Hua
中科院分区:
文献类型:
--
作者:
Yuan, Qi-Rong;Zhou, Xu;Jiang, Zhao-Ji;Wu, Zhen-Yu;Ma, Jun;Yang, Yan-Bin;Zhang, Li;Wu, Jiang-Hua
An optical photometric observation with the Beijing-Arizona-Taiwan- Connecticut (BATC) multicolor system is carried out for A98 (z =0 .104), a galaxy cluster with two large enhancements in X-ray surface brightness. Spectral energy dis- tributions (SEDs) covering15 intermediate bands are obtained for all sources detected down to V ∼ 20 mag in a field of 58 � × 58 � . After star-galaxy separation with color- color diagrams, a photometric redshift technique is applied to the galaxy sample for further membership determination. The color-magnitude relation is taken as a further restriction of the early-type cluster galaxies. As a result, a list of 198 faint member galaxies is achieved. Based on the newly generated sample of member galaxies, the dynamical substructures, A98N, A98S, and A98W, are investigated in detail. A sepa- rate galaxy group, A98X, is also found to the south of the main concentration of A98, which is gravitationally unbound to A98. For 74 spectroscopically confirmed member galaxies, the environmental effect on the star formation history is investigated. The bright galaxies in the core region are found to have shorter time scales of star forma- tion, longer mean stellar ages, and higher interstellar medium metallicities, which can be interpreted in the context of the hierarchical cosmological scenario.
登录
查看更多内容
DOI:
10.1086/323302
发表时间:
2001-10
期刊:
The Astronomical Journal
影响因子:
--
作者:
Q. Yuan;Xu Zhou;Jian-sheng Chen;Zhao-ji Jiang;Jun Ma;Hong Wu;S. Xue;Jin Zhu
通讯作者:
Q. Yuan;Xu Zhou;Jian-sheng Chen;Zhao-ji Jiang;Jun Ma;Hong Wu;S. Xue;Jin Zhu
DOI:
10.1086/172718
发表时间:
1993-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
E. Salvador-Solé;G. González‐Casado;J. Solanes
通讯作者:
E. Salvador-Solé;G. González‐Casado;J. Solanes
DOI:
10.1086/316829
发表时间:
2000-11
期刊:
The Astronomical Journal
影响因子:
--
作者:
J. Pinkney;J. Burns;M. Ledlow;P. Gomez;J. Hill
通讯作者:
J. Pinkney;J. Burns;M. Ledlow;P. Gomez;J. Hill
DOI:
10.1086/115982
发表时间:
1991
期刊:
The Astronomical Journal
影响因子:
--
作者:
T. Beers;K. Gebhardt;W. Forman;J. Huchra;C. Jones
通讯作者:
T. Beers;K. Gebhardt;W. Forman;J. Huchra;C. Jones
影响因子:
4.8
作者:
D. Allen
通讯作者:
D. Allen