Metallicity distribution on the galactic disk

被引：31
|
作者：
Tadross, AL [1 ]
机构：
[1] Natl Res Inst Astron & Geophys, Cairo 11421, Egypt
来源：
NEW ASTRONOMY | 2003年 / 8卷 / 08期
关键词：
open clusters and associations; Galaxy : structure; Galaxy : disk; stars : abundances; Hertzsprung-Russell diagram; stars : evolution;
D O I：
10.1016/S1384-1076(03)00062-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Depending mainly on UBVCCD data, the metallicities of 91 open star clusters nearby the galactic disk have been estimated using Cameron's [A&A 147 (1985b) 39] method. The metallicity radial gradient along the galactic plane is found to be -0.09 dex/kpc; which is in a very good agreement with Panagia and Tosi [A&A 96 (1981) 306] and Carraro et al. [MNRAS 296 (1998) 1045]. Vertically on the galactic disk, within about 800 pc, the metallicity gradient is found to be so trivial. An average age-metallicity relation has been examined, which confirms the previous suggestion that the metallicity of a cluster depending mainly on its position on the galactic disk more than its age. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：737 / 744
页数：8
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