期刊
ASTRONOMY & ASTROPHYSICS
卷 571, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201423802
关键词
stars: mass-loss; dust; extinction; supergiants; stars: late-type; Galaxy: stellar content
资金
- ERC Advanced Investigator [GLOSTAR (247078)]
- NASA [NNG 05-GC37G]
- NYSTAR Faculty Development Program
- Educational Department of China [WK2030220001]
- ESA/ESTEC
- National Aeronautics and Space Administration and the National Science Foundation
- French Institut National des Sciences de l'Univers
- CNRS
- French Education Ministry
- European Southern Observatory
- State of Baden-Wuerttemberg
- European Commission
- Ballistic Missile Defence Organization
- NASA office of Space Science
- National Aeronautics and Space Administration
- Science and Technology Facilities Council [ST/L00061X/1] Funding Source: researchfish
- STFC [ST/L00061X/1] Funding Source: UKRI
Context. Clear identifications of Galactic young stellar clusters farther than a few kpc from the Sun are rare, despite the large number of candidate clusters. Aims. We aim to improve the selection of candidate clusters rich in massive stars with a multiwavelength analysis of photometric Galactic data that range from optical to mid-infrared wavelengths. Methods. We present a photometric and spectroscopic analysis of five candidate stellar clusters, which were selected as overdensities with bright stars (K-s < 7 mag) in GLIMPSE and 2MASS images. Results. A total of 48 infrared spectra were obtained. The combination of photometry and spectroscopy yielded six new red supergiant stars with masses from 10 M-circle dot to 15 M-circle dot. Two red supergiants are located at Galactic coordinates (l, b) = (16.degrees 7, -0 degrees.63) and at a distance of about similar to 3.9 kpc; four other red supergiants are members of a cluster at Galactic coordinates (l, b) = (49 degrees.3, + 0.degrees 72) and at a distance of similar to 7.0 kpc. Conclusions. Spectroscopic analysis of the brightest stars of detected overdensities and studies of interstellar extinction along their line of sights are fundamental to distinguish regions of low extinction from actual stellar clusters. The census of young star clusters containing red supergiants is incomplete; in the existing all-sky near-infrared surveys, they can be identified as overdensities of bright stars with infrared color-magnitude diagrams characterized by gaps.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据