Stellar populations in HII galaxies

被引：33
作者：
Westera, P
Cuisinier, F
Telles, E
Kehrig, C
机构：
[1] Univ Fed Rio de Janeiro, Observ Valongo, GEMAC, BR-20080090 Rio de Janeiro, Brazil
[2] Observ Nacl, BR-20921400 Rio De Janeiro, Brazil
来源：
ASTRONOMY & ASTROPHYSICS | 2004年 / 423卷 / 01期
关键词：
catalogs; stars : atmospheres; HII regions; galaxies : evolution; galaxies : starburst; galaxies : stellar content;
D O I：
10.1051/0004-6361:20048007
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We analyse the stellar content of a large number of HII galaxies from the continua and absorption features of their spectra using Population synthesis methods, in order to gain information about the star formation histories of these objects. We find that all galaxies of our sample contain an old stellar population (greater than or equal to1 Gyr) that dominates the stellar mass, and in a majority of these we also found evidence for an intermediate-age population greater than or equal to50 Myr apart from the presently bursting, ionizing young generation less than or equal to10(7) yr.
引用
收藏
页码：133 / 146
页数：14
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