The stellar oxygen abundance gradient in M33

被引：30
|
作者：
Monteverde, MI
Herrero, A
Lennon, DJ
Kudritzki, RP
机构：
[1] UNIV STERNWARTE,D-81679 MUNICH,GERMANY
[2] MAX PLANCK INST ASTROPHYS,D-85740 GARCHING,GERMANY
来源：
ASTROPHYSICAL JOURNAL | 1997年 / 474卷 / 02期
关键词：
galaxies; abundances; individual; (M33); stars; early-type; supergiants;
D O I：
10.1086/310441
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report here first results concerning stellar oxygen abundances in M33. Non-LTE model atmosphere and non-LTE line formation calculations were used to determine the oxygen abundance of B-type supergiants. By choosing stars located at different projected radial distances to the center of M33, we are able to determine the oxygen abundance gradient, for which we obtain a value of -0.16 +/- 0.06 dex kpc(-1). This is the first time that the oxygen stellar abundance gradient has been determined in a spiral galaxy other than the Milky Way.
引用
收藏
页码：L107 / L110
页数：4
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