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
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 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. |
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来源：紫金山天文台
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