jianjie

中国天文学会学术期刊

天文学进展

PROGRESS IN ASTRONOMY

　

晚型星系金属丰度与自转速度的关系

罗智坚^1,2，傅莉萍³，束成钢^1,3，赵君亮¹
(1. 中国科学院　上海天文台，上海 200030；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，上海 200234)

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。

　

Metallicity vs Rotation Velocity in Late-Type Galaxies

LUO Zhi-jian^1,2, FU Li-ping³, SHU Cheng-gang^1,3, ZHAO Jun-liang¹
(1. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;
2. Physics Department, Jiangxi Normal University, Nanchang 330027, China;
3. Shanghai United Center for Astrophysics, Shanghai Normal University, Shanghai 200234, China)

　Abstract

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.

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