Chemical abundances of OB stars in the cepheus OB2 association

被引：40

作者：

Daflon, S

Cunha, K

Becker, SR

机构：

[1] Observ Nacl, BR-20921400 Rio De Janeiro, Brazil

[2] Univ Texas, Dept Phys, El Paso, TX 79968 USA

[3] Univ Munich, Inst Astron & Astrophys, D-81679 Munich, Germany

来源：

ASTROPHYSICAL JOURNAL | 1999年 / 522卷 / 02期

关键词：

open clusters and associations : individual (Cepheus OB2); stars : abundances; stars : early-type;

D O I：

10.1086/307683

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

LTE and non-LTE abundances of carbon, nitrogen, oxygen, and silicon, as well as LTE abundances of Fe, are presented from analyses of C II, N II, O II, Si III, and Fe III lines in the spectra of eight main-sequence OB stars in the Cep OB2 association. We find that the chemical composition of the studied stars in this association is very homogeneous: the abundances of all elements analyzed do not show significant variations, and the observed abundance dispersions can be explained in terms of the uncertainties in the analysis. The abundance results indicate that this association is slightly metal poor ([Fe/H] = -0.3) with the abundances of all studied elements being subsolar by roughly the same amount.

引用

页码：950 / 959

页数：10