盘状星系的颜色星等关系  

The Color-Magnitude Relation of Disk Galaxies

作　　者：吴海滨[1] 刘成则[2] 张波[2] 常瑞香[3] 

机构地区：[1]石家庄学院物理系,石家庄050035 [2]河北师范大学物理系,石家庄050016 [3]中科院上海天文台,上海200030

出　　处：《天文学报》2007年第1期11-17,共7页Acta Astronomica Sinica

基　　金：国家自然科学基金(10403008;10373005)资助

摘　　要：在Sloan数字巡天计划第二批释放的数据中选择了15257个面向的盘状星系,统计研究它们的颜色星等关系．结果表明3个颜色g-r、r-i、r-z均与r波段的绝对星等有紧密的相关关系,即:越亮的星系,颜色越红,而且色指数弥散越小．并且简单讨论了观测到的颜色星等关系对盘状星系的恒星形成历史的约束．We choose 15257 face-on disk galaxies from Data Release 2 of Sloan Digital Sky Survey and statistically investigate their color magnitude relations. It is shown that the color g - r, r - i, r - z have tight relations with r-band magnitude, i.e., more luminous galaxies have redder colors than less luminous galaxies, and their relations have less dispersion. In the end, the implications of the observed color-magnitude relations on the star formation history of disk galaxy are discussed.

关 键 词：星系 基本参数 分类 颜色 光度 质量 半径 丰度 形成 星系演化 

分 类 号：P157[天文地球—天文学]