NGC 5018年轻恒星群的证据
天体物理学
2009-10-31 v1
摘要
使用从高分辨率光谱中测得的Ca II和Hdelta/FeI4045两个吸收线指数,结合进化合成模型,以验证NGC 5018中是否存在年轻恒星群。该群的推导年龄约为~2.8 Gyr,金属丰度大约为太阳值,且在4000 Å附近完全支配该星系的整体光度。
引用
@article{arxiv.astro-ph/0002321,
title = {Evidence for a Young Stellar Population in NGC 5018},
author = {A. J. Leonardi and G. Worthey},
journal= {arXiv preprint arXiv:astro-ph/0002321},
year = {2009}
}
备注
13 pages, 7 figures (figs 3-7 are color figures), to be published in the May 2000 issue of the Astrophysical Journal