MG AND FE ABSORPTION FEATURES IN ELLIPTIC GALAXIES

被引：567

作者：

WORTHEY, G

FABER, SM

GONZALEZ, JJ

机构：

[1] UCO/Lick Observatory, Bd. of Studs. in Astron./Astrophys., University of California, Santa Cruz

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 398卷 / 01期

关键词：

GALAXIES; ABUNDANCES; ELLIPTIC AND LENTICULAR; CD; EVOLUTION; FORMATION; STELLAR CONTENT;

D O I：

10.1086/171836

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Fe and Mg indices from two homogenous collections of nuclear elliptical galaxy spectra are compared with model indices. In the average giant elliptical, the [Mg/Fe] ratio exceeds that of the most metal-rich stars in the solar neighborhood by approximately 0.2-0.3 dex, with a large spread about this mean. This result implies a variable "enrichment effectiveness" of Type II supernovae (SNs) compared with Type Ia SNs in the evolution of ellipticals, caused perhaps by differences in star formation time scales, the initial mass function, or the amount of Fe versus Mg ejected in galactic winds.

引用

页码：69 / 73

页数：5

共 38 条

[1] ABUNDANCES OF THE ELEMENTS - METEORITIC AND SOLAR [J].