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Near-infrared imaging of the star forming region S87
Chen, YX; Zheng, XW; Yao, YQ; Yang, J; Sato, S
AbstractNear-infrared images of the star forming region S87 in the JHK broad-band filters and H-2 v = 1-0 S(1) narrow-band filter are presented. In the eastern part of the region, the S87E nebula shows a quite complex structure. In the optically thin southern part of the nebula, there is an elongated cavity in the direction aligned with the blue-shifted molecular outflow. A subcluster of twelve young near-infrared sources has been detected in the optically thick northern part of the nebula, where a cone-shaped opaque patch is seen. In the 90" x 90" region around S87E, we detected I I I sources with m(K), > 15.2 mag. From analysis of the JHK' colors of the stars inside S87E, we find that after adjusting for background contamination, more than 40% of all the sources associated with the cluster display infrared excesses. This high fraction of infrared excess sources, along with the evidence of molecular outflow activity near the cluster, suggests that the S87E cluster is very young(similar to3-4 x 10(6) yr). We construct the differential K' luminosity function for S87E and find the overall shape and structure are somewhat different to that of other young clusters. Besides a common turnover at 14 mag, there is a prominent peak and still more cluster members with luminosities fainter than 14th magnitude at K' band. Five H-2 regions were also discovered and three of them are associated with the S87E nebula.
KeywordInfrared : Stars Ism : Individual : S87 Ism : Reflection Nebulae Stars : Formation
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000181611800015
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
3.Nagoya Univ, Sch Sci, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 46401, Japan
Recommended Citation
GB/T 7714
Chen, YX,Zheng, XW,Yao, YQ,et al. Near-infrared imaging of the star forming region S87[J]. ASTRONOMY & ASTROPHYSICS,2003,401(1):185-192.
APA Chen, YX,Zheng, XW,Yao, YQ,Yang, J,&Sato, S.(2003).Near-infrared imaging of the star forming region S87.ASTRONOMY & ASTROPHYSICS,401(1),185-192.
MLA Chen, YX,et al."Near-infrared imaging of the star forming region S87".ASTRONOMY & ASTROPHYSICS 401.1(2003):185-192.
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