中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Deep near-infrared survey toward the M17 region

文献类型:期刊论文

作者Jiang, ZB; Yao, YQ; Yang, J; Ando, M; Kato, D; Kawai, T; Kurita, M; Nagata, T; Nagayama, T; Nakajima, Y
刊名ASTROPHYSICAL JOURNAL
出版日期2002-09-20
卷号577期号:1页码:245-259
关键词infrared : ISM ISM : individual (M17) ISM : lines and bands stars : formation stars : pre-main-sequence
ISSN号0004-637X
英文摘要We conducted a deep JHK(s)-band imaging survey of the M17 region, using a near-infrared camera, the Simultaneous 3-color InfraRed Imager for Unbiased Survey ( SIRIUS), mounted on the InfraRed Survey Facility (IRSF) 1.4 m telescope at the South African Astronomical Observatory. This survey covers an area of similar to200 arcmin(2) with 10 sigma limiting magnitudes of J similar to 18.7, H similar to 18.2, and K-s similar to 17.5. The near-infrared (NIR) images reveal an unprecedented view of the region. The NIR nebulae are highly structured, with two nebular bars corresponding to, but a little larger than, the H II region defined by Felli, Massi, & Churchwell, constructing a conical shape. Fine structures are found all over the nebular area. The central region contains a congregation of intermediate- to high-mass stars. From the slope of the K-s-band luminosity function and the frequency of young stellar objects (YSOs) we infer that the central cluster has an age less than 3 Myr. The central OB cluster provides tremendous energy that heats and ionizes its surrounding materials, triggering the star formation of second-generation in the nebular bars. The second generation stars are so numerous that could they affect the star formation efficiency in the whole region. To the southwest of the central cluster and the nebular bars, where a giant molecular cloud core is located, a large number of red stars are detected. We argue that these red stars are most probably associated YSOs with intrinsic color excesses, not normal field stars reddened by the molecular cloud in front of them. Being located beyond the photodissociation region, the star-forming process in the molecular region could be independent of the impact of the central cluster.
WOS标题词Science & Technology ; Physical Sciences
学科主题Astronomy & Astrophysics
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]YOUNG STELLAR OBJECTS ; MOLECULAR CLOUD ; LUMINOSITY FUNCTIONS ; M-17 ; PHOTOMETRY ; EXTINCTION ; RESOLUTION ; CLUSTERS ; IMAGES ; STARS
收录类别SCI
语种英语
WOS记录号WOS:000178033200022
公开日期2013-01-29
源URL[http://libir.pmo.ac.cn/handle/332002/7799]  
专题紫金山天文台_分子云与恒星形成研究团组
作者单位1.Chinese Acad Sci, Natl Astron Observ, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Nagoya Univ, Fac Sci, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan
3.Natl Astron Observ Japan, Tokyo 1818858, Japan
4.Natl Astron Observ Japan, Subaru Telescope, Hilo, HI 96720 USA
5.Nagoya City Univ, Inst Nat Sci, Mizuho Ku, Nagoya, Aichi 4678501, Japan
推荐引用方式
GB/T 7714
Jiang, ZB,Yao, YQ,Yang, J,et al. Deep near-infrared survey toward the M17 region[J]. ASTROPHYSICAL JOURNAL,2002,577(1):245-259.
APA Jiang, ZB.,Yao, YQ.,Yang, J.,Ando, M.,Kato, D.,...&Sugitani, K.(2002).Deep near-infrared survey toward the M17 region.ASTROPHYSICAL JOURNAL,577(1),245-259.
MLA Jiang, ZB,et al."Deep near-infrared survey toward the M17 region".ASTROPHYSICAL JOURNAL 577.1(2002):245-259.

入库方式: OAI收割

来源:紫金山天文台

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。