How does star formation build a galactic disk?

被引：0
|
作者：
Wong, T [1 ]
Blitz, L [1 ]
机构：
[1] Australia Telescope Natl Facil, Epping, NSW 1710, Australia
来源：
Initial Mass Function 50 years Later | 2005年 / 327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：
The combination of near-infrared and Hoe photometry with CO and H I imaging allows us to probe past, ongoing, and future star formation in galaxies. Such a comparison for our Galaxy has yielded a puzzling contradiction between the derived star formation history and the assumed star formation law, but the uncertainties in the gas and stellar radial profiles are large. Recent data for seven nearby galaxies are presented and reveal no such contradiction: star formation has roughly declined in accordance with the consumption of gas assuming a standard Schmidt star formation law, arguing against strong temporal variations in the IMF. Furthermore, the effective oxygen yield shows no strong radial gradient, arguing against strong radial variations in the IMF.
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页码：299 / 300
页数：2
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