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New detection of near-infrared H(2) line emission in AFGL 5157
Chen, YF; Yao, YQ; Yang, J; Zeng, Q; Sato, SJ
2003-07-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume405Issue:2Pages:655-661
AbstractNarrow-band H(2) v = 1-0 S (1) and broad-band K' imaging observations towards AFGL 5157 revealed a number of new H(2) knots associated with the NH(3) core in the region, implying that the multiple H(2) outflows are driven by a cluster of embedded point sources in the core. The shell around the infrared cluster is more clearly seen than before, showing a few of newly detected ridge-like features. A string of H(2) knots newly revealed along one lobe of the known CO outflow suggests a parsec-scaled jet emanating from a young source in the core. These H(2) outflows and jet, together with the known compact H II region, radio continuum source, and H(2)O masers further imply an extremely embedded cluster containing massive stars within it. The evidence shows that the massive young stars within the cluster are in a strong outflow stage of evolution, and together with the nearby infrared cluster in NGC1985, further confirms that star forming process propagates from the west to the east in AFGL 5157. The two types of H(2) line emission, knots and shell, may be indicators of two different stages of star formation in clusters: the shocked H(2) knots are driven by the young stellar sources embraced in the younger cluster, while the diffuse shell-like structure comes from UV photons of relatively evolved cluster. The near-infrared nebula in AFGL 5157 is found to be only associated with the evolved cluster but not observed in the embedded cluster.
KeywordIsm : Lines And bAnds Ism : Individual Objects : Afgl 5157 Ism : Jets And Outflows Stars : Formation
Subject AreaAstronomy & Astrophysics ; Mathematics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1051/0004-6361:20030666
WOS KeywordSTAR-FORMING REGIONS ; DRIVEN MOLECULAR OUTFLOW ; WATER MASER DETECTIONS ; YOUNG STELLAR OBJECTS ; H-II-REGIONS ; H2O MASERS ; JET ; CO ; SIMULATIONS ; AMMONIA
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000183615700029
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4580
Collection分子云与恒星形成研究团组
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Nagoya Univ, Dept Astrophys, Nagoya, Aichi 4640062, Japan
Recommended Citation
GB/T 7714
Chen, YF,Yao, YQ,Yang, J,et al. New detection of near-infrared H(2) line emission in AFGL 5157[J]. ASTRONOMY & ASTROPHYSICS,2003,405(2):655-661.
APA Chen, YF,Yao, YQ,Yang, J,Zeng, Q,&Sato, SJ.(2003).New detection of near-infrared H(2) line emission in AFGL 5157.ASTRONOMY & ASTROPHYSICS,405(2),655-661.
MLA Chen, YF,et al."New detection of near-infrared H(2) line emission in AFGL 5157".ASTRONOMY & ASTROPHYSICS 405.2(2003):655-661.
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