PMO OpenIR  > 分子云与恒星形成研究团组
A near-infrared study of the star-forming region S269
Jiang, ZB; Yao, YQ; Yang, J; Baba, D; Kato, D; Kurita, M; Nagashima, C; Nagata, T; Nagayama, T; Nakajima, Y; Ishii, M; Tamura, M; Sugitani, K
AbstractThe star-forming region S269 is studied with deep JHK(s) and H(2)v = 1-0 S(1) images and K-band spectroscopy. The JHK(s) images reveal a rich embedded cluster at the center of the field; most stars in the cluster are located in two major congregations. The colors of the two congregations and of the associated nebulosities are quite different. The color-color diagrams and color-magnitude diagrams of the two subgroups show that their intrinsic colors are not significantly different, suggesting that they could be formed at a similar age. Between the subgroups there are two near-infrared sources, IRS 2e and 2w. Their K-band spectra rise toward longer wavelengths, indicative of a dense dusty envelope surrounding them. Strong H(2) and Brgamma lines are detected on these two objects. A poorly collimated bipolar H2 jet has been detected around IRS 2e and 2w. The morphology of the infrared jet and K-band spectra of the two infrared sources suggest that the jet is likely driven by IRS 2e or 2w, or both. Several lines of evidence suggest that IRS 2e and 2w are massive young stellar objects probably younger than most of the stars in the region. Given the facts above, we speculate that lower mass star-forming activities in a stellar cluster could play an important role in the formation of a massive star.
KeywordHii Regions Infrared : Ism Ism : Individual (S269) Ism : Lines And bAnds Stars : Formation
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000185916000025
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Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Nagoya Univ, Sch Sci, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan
3.Natl Astron Observ Japan, Opt & Infrared Astron Div, Mitaka, Tokyo 1818588, Japan
4.Nagoya City Univ, Inst Nat Sci, Nagoya, Aichi 4678501, Japan
Recommended Citation
GB/T 7714
Jiang, ZB,Yao, YQ,Yang, J,et al. A near-infrared study of the star-forming region S269[J]. ASTROPHYSICAL JOURNAL,2003,596(2):1064-1079.
APA Jiang, ZB.,Yao, YQ.,Yang, J.,Baba, D.,Kato, D.,...&Sugitani, K.(2003).A near-infrared study of the star-forming region S269.ASTROPHYSICAL JOURNAL,596(2),1064-1079.
MLA Jiang, ZB,et al."A near-infrared study of the star-forming region S269".ASTROPHYSICAL JOURNAL 596.2(2003):1064-1079.
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