Is there any pristine gas in nearby starburst galaxies?

被引：0
|
作者：
Lebouteiller, Vianney [1 ]
Kunth, Daniel [2 ]
机构：
[1] Cornell Univ, Ctr Radiophys & Space Res, Space Sci Bldg, Ithaca, NY 14853 USA
[2] Univ Paris 06, Inst Astrophys Paris, CNRS, F-75014 Paris, France
来源：
LOW-METALLICITY STAR FORMATION: FROM THE FIRST STARS TO DWARF GALAXIES | 2008年 / 255期
关键词：
ISM: abundances; (ISM:) HII regions; galaxies: abundances; galaxies: dwarf; galaxies: starburst; galaxies: ISM; ultraviolet: ISM; ultraviolet: galaxies;
D O I：
10.1017/S1743921308024940
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We derive the chemical composition of the neutral gas in the blue compact dwarf (BCD) Pox 36 observed with FUSE. Metals (N, O, Ar, and Fe) are iniderabundant as compared to the ionized gas associated with H II regions by a factor similar to 7. The neutral gas, although it is not, pristine, is thus probably less chemically evolved than the ionized gas. This could be due to different dispersal and mixing timescales. Results are compared to those of other BCDs observed with FUSE. The metallicity of the neutral gas in BCDs seems to reach a lower threshold of similar to 1/50 Z(circle dot) for extremely-metal poor galaxies.
引用
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页码：278 / +
页数：2
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