Observations of H2 in quasar absorbers

被引：0
|
作者：
Bechtold, J [1 ]
机构：
[1] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
来源：
MOLECULAR HYDROGEN IN SPACE | 2000年
关键词：
D O I：
10.1017/CBO9780511564635.047
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The ultraviolet Lyman and Werner absorption lines of H-2 have been searched for in a number of high redshift quasar spectra, and detected unambiguously in at least 3 systems at redshifts zsimilar to2. The lack of detectable H-2 in most absorbers results from the strong selection in quasar studies against lines-of-sight with significant dust extinction. At high redshift, the ultraviolet radiation field is inferred to be higher than that observed in the local solar neighborhood, suggesting that vigorous star-formation is underway in these galaxies.
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收藏
页码：301 / 305
页数：5
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