Three very young HgMn stars in the Orion OB1 association

被引：15
|
作者：
Woolf, VM
Lambert, DL
机构：
[1] Univ Texas, Dept Astron, Austin, TX 78712 USA
[2] Univ Texas, McDonald Observ, Austin, TX 78712 USA
来源：
ASTROPHYSICAL JOURNAL | 1999年 / 520卷 / 01期
基金：
美国国家科学基金会;
关键词：
open clusters and associations : individual (Orion OB1); stars : abundances; stars : chemically peculiar; stars; individual; (BD-0; degrees; 984; HD; 37492; 37886);
D O I：
10.1086/312146
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the detection of three mercury-manganese stars in the Orion OB1 association. HD 37886 and ED -0 degrees 984 are in the approximately 1.7 million year old Orion OB1b. HD 37492 is in the approximately 4.6 million year old Orion OB1c. Orion OB1b is now the youngest cluster with known HgMn star members. This places an observational upper limit on the timescale needed to produce the chemical peculiarities seen in mercury-manganese stars, which should help in the search for the cause or causes of the peculiar abundances in HgMn and other chemically peculiar upper main-sequence stars.
引用
收藏
页码：L55 / L58
页数：4
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