The star formation history of late-type galaxies

被引：0
|
作者：
James, Philip A. [1 ]
Prescott, Matthew [1 ]
机构：
[1] Liverpool John Moores Univ, Astrophys Res Inst, Egerton Wharf CH41 1LD, Brikenhead, England
来源：
PATHWAYS THROUGH AN ECLECTIC UNIVERSE | 2008年 / 390卷
关键词：
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate the dominant mode of star formation in late-type galaxies using an analysis of the distribution of star formation timescales (stellar masses/star formation rates) for 117 Im and Sm galaxies. We find that these galaxies could have produced their stellar mass by extrapolation of their current rate of growth over a Hubble time. No quiescent galaxies are found, supporting continuous rather than "bursty" modes of star formation. The spatial distributions of new and old populations are mutually consistent in these late-type galaxies and the optical-to-near-infrared colors are as expected from continuous star formation activity.
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页码：242 / 246
页数：5
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