THE RADIAL-DISTRIBUTION OF OXYGEN IN DISK GALAXIES

被引：45

作者：

ZARITSKY, D ^{[1
]}

机构：

[1] OBSERV CARNEGIE INST WASHINGTON,PASADENA,CA 91101

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 390卷 / 02期

关键词：

GALAXIES; ABUNDANCES; EVOLUTION; H-II REGIONS;

D O I：

10.1086/186375

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The shape of the oxygen abundance profile is examined for seven nearby spiral galaxies in which at least 15 H II regions have been observed. The radial abundance profile for three of these galaxies has a distinct change in slope. The others show no deviation from a single scale-length exponential. This behavior is explained within the framework of the star-forming viscous disk model of galaxy evolution. A prediction is made that radial abundance profiles of noninteracting unbarred spiral galaxies change slope at the radius where the rotation curve changes from linearly rising to flat. For barred and interacting galaxies the situation is complicated by additional mixing mechanisms of the interstellar medium.

引用

页码：L73 / L76

页数：4

共 21 条

[1] THE MOLECULAR BAR AND STAR FORMATION IN THE NUCLEUS OF NGC-6946 [J].