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| 同等质量下盘状星系的颜色-尺度关系 | |
| 引用本文： | 付炜,常瑞香,沈世银,张波.同等质量下盘状星系的颜色-尺度关系[J].天文学报,2011,52(1):25-33. |
| 作者姓名： | 付炜 常瑞香 沈世银 张波 |
| 作者单位： | 1. 河北师范大学物理科学与信息工程学院,石家庄,050016;中国科学院上海天文台星系与宇宙学重点实验室,上海,200030;上海市星系与宇宙学半解析研究重点实验室,上海,200234 2. 中国科学院上海天文台星系与宇宙学重点实验室,上海,200030;上海市星系与宇宙学半解析研究重点实验室,上海,200234 3. 河北师范大学物理科学与信息工程学院,石家庄,050016 |
| 基金项目： | 国家自然科学基金项目(10803016和10833005)资助 |
| 摘 要： | 挑选Sloan数字巡天第7次释放数据(SDSS DR7)的主星系样本中近邻的、面向的盘状星系作为星系样本,统计研究了在恒星总质量相等的情况下盘状星系的颜色和尺度之间的相关性,并对相关性的真实性进行了检验.发现对于同等质量的盘状星系,u-r颜色与尺度相关性很弱,而g-r、r-i、r-z颜色与尺度负相关,即星系的尺度越大,颜色越蓝.该结果意味着盘状星系的质量分布对其恒星形成历史影响很大,物质分布越延展的星系,其演化越慢. |
| 关 键 词： | 星系:演化 星系:旋涡 星系:统计 |
Color-size Relations of Disc Galaxies with Similar Stellar Masses |
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| FU Wei,CHANG Rui-xiang,SHEN Shi-yin,ZHANG Bo.Color-size Relations of Disc Galaxies with Similar Stellar Masses[J].Acta Astronomica Sinica,2011,52(1):25-33. | |
| Authors: | FU Wei CHANG Rui-xiang SHEN Shi-yin ZHANG Bo |
| Institution: | FU Wei~(1,2,3) CHANG Rui-xiang~(2,3) SHEN Shi-yin~(2,3) ZHANG Bo~1 (1 College of Physics Science and Information Technology,Hebei Normal University,Shijiazhuang 050016) (2 Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030) (3 Key Laboratory for Astrophysics,Shanghai 200234) |
| Abstract: | To investigate the correlations between colors and sizes of disc galaxies with similar stellar masses,a sample of 7959 local face-on disc galaxies is collected from the main galaxy sample of the Seventh Data Release of Sloan Digital Sky Survey(SDSS DR7).Our results show that,under the condition that the stellar masses of disc galaxies are similar, the relation between u-r and size is weak,while g-r,r-i and r-z colors decrease with disk size.This means that the color-size relations of disc galaxies with simi... |
| Keywords: | galaxies evolution spiral statistics |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |