A search for peculiar objects in young open clusters I. New emission line and late spectral type stars in NGC 6871

被引：6

作者：

Bernabei, S

Polcaro, VF

机构：

[1] CNR, Ist Astrofis Spaziale, Area Ric Roma Tor Vergata, I-00133 Rome, Italy

[2] Osservatorio Astron Bologna, I-40127 Bologna, Italy

[3] Univ La Laguna, Dipartimento Astrofis, La Laguna 30071, Spain

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 366卷 / 03期

关键词：

stars : early types; stars; emission-line; Be; stars : evolution; stars : individual (HD 227733; VES 145); stars : late-type;

D O I：

10.1051/0004-6361:20000237

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first results of a search in young open clusters for stars of very high initial mass, carried out by means of slitless spectroscopy. A deep (R similar or equal to 17) survey of the open cluster NGC 6871 reveals many new objects of late spectral type, including an S star, as well as three new emission line stars, which are classified as Be stars. The already known Be star HD 227733 is surrounded by a previously undetected reflection nebula. The star VES 145, classified as an emission line object: is actually a late-type star, without any emission feature. We argue that VES 145 is a young RSG of a very high. mass (M-0 similar or equal to 25 M-circle dot) and a cluster member.

引用

页码：817 / 826

页数：10

共 21 条

[1] A moderate-resolution spectral atlas of carbon stars: R, J, N, CH, and barium stars [J].