A CATALOG OF NEW SPECTROSCOPICALLY CONFIRMED MASSIVE OB STARS IN CARINA

被引：28

作者：

Alexander, Michael J. ^{[1
]}

Hanes, Richard J. ^{[1
]}

Povich, Matthew S. ^{[2
]}

McSwain, M. Virginia ^{[1
]}

机构：

[1] Lehigh Univ, Dept Phys, 16 Mem Dr East, Bethlehem, PA 18015 USA

[2] Calif State Polytech Univ Pomona, Dept Phys & Astron, Pomona, CA 91768 USA

来源：

ASTRONOMICAL JOURNAL | 2016年 / 152卷 / 06期

基金：

美国国家科学基金会;

关键词：

binaries: spectroscopic; open clusters and associations: individual (Carina); stars: massive; X-RAY; COMPLEX PROJECT; STELLAR CONTENT; NEBULA; CLUSTERS;

D O I：

10.3847/0004-6256/152/6/190

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Carina star-forming region is one of the largest in the Galaxy, and its massive star population is still being unveiled. The large number of stars combined with high, and highly variable, interstellar extinction makes it inherently difficult to find OB stars in this type of young region. We present the results of a spectroscopic campaign to study the massive star population of the Carina Nebula, with the primary goal to confirm or reject previously identified Carina OB star candidates. A total of 141 known O- and B-type stars and 94 candidates were observed, of which 73 candidates had high enough signal-to-noise ratio to classify. We find 23 new OB stars within the Carina Nebula, a 32% confirmation rate. One of the new OB stars has blended spectra and is suspected to be a double-lined spectroscopic binary (SB2). We also reclassify the spectral types of the known OB stars and discover nine new SB2s among this population. Finally, we discuss the spatial distribution of these new OB stars relative to known structures in the Carina Nebula.

引用

页数：9

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