Evidence for a young stellar population in NGC 5018

被引：21
作者：
Leonardi, AJ
Worthey, G
机构：
[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA
[2] St Ambrose Univ, Dept Phys & Astron, Davenport, IA 52803 USA
来源：
ASTROPHYSICAL JOURNAL | 2000年 / 534卷 / 02期
基金：
美国国家科学基金会;
关键词：
galaxies : abundances; galaxies : evolution; galaxies : individual (NGC 5018); galaxies : starburst; galaxies : stellar content; line : profiles;
D O I：
10.1086/308764
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Two absorption line indices, Ca II and H delta/lambda 4045, measured from high-resolution spectra are used with evolutionary synthesis models to verify the presence of a young stellar population in NGC 5018. The derived age of this population is similar to 2.8 Gyr with a metallicity roughly solar, and it completely dominates the integrated light of the galaxy near 4000 Angstrom.
引用
收藏
页码：650 / 659
页数：10
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