PMO OpenIR  > 分子云与恒星形成研究团组
Molecular gas and dust in the massive star forming region S233IR
Mao, RQ; Zeng, Q
2004-10-01
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
ISSN1009-9271
Volume4Issue:5Pages:440-454
AbstractThe massive star forming region S 233 IR is observed in the molecular lines CO J = 2-1, 3-2, NH3 (1,1), (2,2) and the 870 mum dust continuum. Four submillimeter continuum sources, labelled SMM 1-4, are revealed in the 870 mum dust emission. The main core, SMM1, is found to be. associated with a deeply embedded near infrared cluster in the northeast; while the weaker source SMM2 coincides with a more evolved cluster in the southwest. The best fit spectral energy distribution of SMM1 gives an emissivity of beta = 1.6, and temperatures of 32 K and 92 K for the cold- and hot-dust components. An SMM1 core mass of 246 M-circle dot and a total mass of 445 M-circle dot are estimated from the 870 mum dust continuum emission. SMM1 is found to have a temperature gradient decreasing from inside out, indicative of the presence of interior heating sources. The total outflow gas mass as traced by the CO J = 3-2 emission is estimated to be 35 M-circle dot. Low velocity outflows are also found in the NH3 (1,1) emission. The non-thermal dominant NH3 line width as well as the substantial core mass suggest that the. SMM1 core is a "turbulent, massive dense core", in the process of forming a group or,a cluster of stars. The much higher star formation efficiency found in the southwest cluster supports the suggestion that this cluster is more evolved than the northeast one. Large near infrared photometric variations found in the source PCS-IR93, a previously found highly polarized nebulosity, indicate an underlying star showing the FU Orionis type of behavior.
KeywordIsm : Jets And Outflows Ism : Molecules Ism : Dust, Extinction Stars : Formation Ism : Individual (Iras 05358+3543 S233ir)
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordPROTOSTELLAR CANDIDATES ; DENSE CORES ; OUTFLOWS ; CLUSTERS ; CONTINUUM ; AMMONIA ; CLOUDS ; CLUMPS ; DISCOVERY ; ACCRETION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000224698100004
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7695
Collection分子云与恒星形成研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Mao, RQ,Zeng, Q. Molecular gas and dust in the massive star forming region S233IR[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2004,4(5):440-454.
APA Mao, RQ,&Zeng, Q.(2004).Molecular gas and dust in the massive star forming region S233IR.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,4(5),440-454.
MLA Mao, RQ,et al."Molecular gas and dust in the massive star forming region S233IR".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 4.5(2004):440-454.
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