THE CARBON ABUNDANCE OF THE LYMAN-ALPHA CLOUDS

被引：43
作者：
LU, LM [1 ]
机构：
[1] UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,LA JOLLA,CA 92093
来源：
ASTROPHYSICAL JOURNAL | 1991年 / 379卷 / 01期
关键词：
ABUNDANCES; GALAXIES - INTERGALACTIC MEDIUM; QUASARS;
D O I：
10.1086/170487
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A search for C IV lambda-lambda-1548, 1550 absorption associated with Ly-alpha forest clouds is attempted, using a method similar to the composite spectrum method developed by Norris, Hartwick, & Peterson. We tentatively report a detection of C IV lambda-1548 absorption feature at greater-than-or-equal-to 99.99% significance level. If confirmed, not all Ly-alpha clouds have primordial composition. Assuming that the absorption feature is real, we estimate the relative abundance of carbon of the Ly-alpha forest clouds to be roughly [C/H] approximately -3.2 from photoionization models. Some other interesting results are also discussed.
引用
收藏
页码：99 / 106
页数：8
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