晚型星系金属丰度与自转速度的关系  

Metallicity vs Rotation Velocity in Late-Type Galaxies

作　　者：罗智坚[1,2] 傅莉萍[3] 束成钢[1] 赵君亮[1] 

机构地区：[1]中国科学院上海天文台 [2]江西师范大学物理系,南昌330027 [3]上海师范大学天体物理中心

出　　处：《天文学进展》2004年第1期71-80,共10页Progress In Astronomy

基　　金：国家自然科学基金资助项目(10333020;10073016);国家973资助项目(G1999075406);上海市科委资助项目(03XD14014)

摘　　要：星系物质化学组成的研究不仅对于理解有关星系形成和演化的各种物理过程具有重要意义,而且还可以对星系形成和演化的各种理论模型提供重要的约束。随着观测技术及理论工作水平的不断提高,利用星系的大量观测资料来系统地研究星系化学组成与星系宏观性质之间的关系将成为可能。星系金属丰度与光度之间的强相关性以及晚型星系金属丰度与自转速度的关系即是其中最有意义的内容之一。全面回顾了星系金属丰度与星系宏观观测性质间关系的研究历史,重点评述了晚型星系金属丰度与自转速度关系的最新研究进展,详细讨论了目前对此类关系的物理解释及其对星系形成和演化模型的影响。The studies on the chemical abundances in galaxies are very important to understand the physical processes in galaxy formation and evolution, and to provide strong constraints on its framework. With the advantage of observation techniques and theoretical researches, systematic investigations on the relationships between metallicity and macroscopic properties in galaxies are possible, among which the strong correlation between metallicity and galaxy luminosity of galaxies is one of the most significant phenomena. However, recent researches have shown that the correlation of metallicity vs rotation velocity for spiral and irregular galaxies has no such noticeable phenomena. There seems to be a critical value in rotation velocity, below which the metallicity increases with rotation velocity, and above which the metallicity is almost constant. In the present paper, we summarize in detail the observed correlation between metallicity and rotation velocity for spiral and irregular galaxies, and the physical mechanisms are also discussed.

关 键 词：天体物理学 晚型星系 金属丰度 自转速度 星系形成 星系演化 

分 类 号：P152[天文地球—天文学]