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SULFUR-BEARING MOLECULES IN MASSIVE STAR-FORMING REGIONS: OBSERVATIONS OF OCS, CS, H2S, AND SO
Li, Juan1; Wang, Junzhi1; Zhu, Qingfeng2; Zhang, Jiangshui3; Li, Di4,5
2015-03-20
Source PublicationASTROPHYSICAL JOURNAL
Volume802Issue:1
AbstractWe studied the sulfur chemistry of massive star-forming regions through single-dish submillimeter spectroscopy. OCS, (OCS)-C-13, (CS)-C-13, H2S, and SO transitions were observed toward a sample of massive star-forming regions with embedded UCH II or CH II regions. These sources could be divided into H II-hot core and H II-only sources based on their CH3CN emission. Our results show that the OCS line of thirteen sources is optically thick, with optical depth ranging from 5 to 16. Column densities of these molecules were computed under LTE conditions. CS column densities were also derived using its optically thin isotopologue (CS)-C-13. H2S is likely to be the most abundant gas-phase sulfuretted molecule in hot massive cores. Both the column density and abundance of sulfur-bearing molecules decrease significantly from H II-hot core to H II-only sources. Ages derived from hot core models appear to be consistent with star formation theories, suggesting that abundance ratios of [CS]/[SO], [SO]/[OCS], and [OCS]/[CS] could be used as chemical clocks in massive star-forming regions.
KeywordIsm: Abundances Ism: Clouds Ism: Molecules Molecular Processes Radio Lines: Ism
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/802/1/40
WOS KeywordH-II REGIONS ; INFRARED DARK CLOUDS ; HII-REGIONS ; COLOGNE DATABASE ; LINE EMISSION ; HOT CORES ; ULTRACOMPACT ; CHEMISTRY ; ORION ; SPECTROSCOPY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000351834700040
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15782
Collection毫米波和亚毫米波技术实验室
Affiliation1.Shanghai Astron Observ, Shanghai 20030, Peoples R China
2.Chinese Acad Sci, Univ Sci & Technol, Dept Astron, Hefei 210008, Peoples R China
3.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
5.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Li, Juan,Wang, Junzhi,Zhu, Qingfeng,et al. SULFUR-BEARING MOLECULES IN MASSIVE STAR-FORMING REGIONS: OBSERVATIONS OF OCS, CS, H2S, AND SO[J]. ASTROPHYSICAL JOURNAL,2015,802(1).
APA Li, Juan,Wang, Junzhi,Zhu, Qingfeng,Zhang, Jiangshui,&Li, Di.(2015).SULFUR-BEARING MOLECULES IN MASSIVE STAR-FORMING REGIONS: OBSERVATIONS OF OCS, CS, H2S, AND SO.ASTROPHYSICAL JOURNAL,802(1).
MLA Li, Juan,et al."SULFUR-BEARING MOLECULES IN MASSIVE STAR-FORMING REGIONS: OBSERVATIONS OF OCS, CS, H2S, AND SO".ASTROPHYSICAL JOURNAL 802.1(2015).
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