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The global chemical properties of high-mass star forming clumps at different evolutionary stages
Zhang, Yan-Jun1,2; Zhou, Jian-Jun1,3; Esimbek, Jarken1,3; He, Yu-Xin1,2; Li, Da-Lei1,2; Tang, Xin-Di1,3; Ji, Wei-Guang1,3; Yuan, Ye1,3; Guo, Wei-Hua1,2
2016-06-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume361Issue:6Pages:191
Contribution Rank1
Abstract

A total of 197 relatively isolated high-mass starforming clumps were selected from the Millimeter Astronomy Legacy Team 90 GHz (MALT90) survey data and their global chemical evolution investigated using four molecular lines, N2H+ (1-0), HCO+ (1-0), HCN (1-0), and HNC (1-0). The results suggest that the global averaged integrated intensity ratios I (HCO+)/I (HNC), I (HCN)/I (HNC), I (N2H+)/I (HCO+), and I (N2H+)/I (HCN) are promising tracers for evolution of high-mass star-forming clumps. The global averaged column densities and abundances of N2H+, HCO+, HCN, and HNC increase as clumps evolve. The global averaged abundance ratios X(HCN)/X(HNC) could be used to trace evolution of highmass star forming clumps, X(HCO+)/X(HNC) is more suitable for distinguishing high-mass star-forming clumps in prestellar (stage A) from those in protostellar (stage B) and HII/PDR region (stage C). These results suggest that the global averaged integrated intensity ratios between HCN (1-0), HNC (1-0), HCO+ (1-0) and N2H+ (1-0) are more suitable for tracing the evolution of high-mass star forming clumps. We also studied the chemical properties of the target high-mass star-forming clumps in each spiral arm of the Galaxy, and got results very different from those above. This is probably due to the relatively small sample in each spiral arm. For high-mass star-forming clumps in Sagittarius arm and Norma-Outer arm, comparing two groups located on one arm with different Galactocentric distances, the clumps near the Galactic Center appear to be younger than those far from the Galactic center, which may be due to more dense gas concentrated near the Galactic Center, and hence more massive stars being formed there.

Correspondent Emailzhangyanjun@xao.ac.cn
KeywordAstrochemistry Ism: Clouds Ism: Molecules Ism: Abundances Stars: Formation
SubtypeArticle
DOI10.1007/s10509-016-2773-5
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordGalactic Plane ; Ab-initio ; Mu-m ; Chemistry ; Hnc ; Hcn ; Abundances ; Emission ; Spectrum ; Catalog
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000376618900014
Funding OrganizationNational Natural Science foundation of China(11433008 ; National Basic Research Program of China (973 program)(2012CB821802) ; Program of the Light in China's Western Region (LCRW)(RCPY201202 ; 11373062 ; XBBS-2014-24) ; 11303081)
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/1397
Collection射电天文研究室_恒星形成与演化研究团组
射电天文研究室
Corresponding AuthorZhang, Yan-Jun
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang, Yan-Jun,Zhou, Jian-Jun,Esimbek, Jarken,et al. The global chemical properties of high-mass star forming clumps at different evolutionary stages[J]. ASTROPHYSICS AND SPACE SCIENCE,2016,361(6):191.
APA Zhang, Yan-Jun.,Zhou, Jian-Jun.,Esimbek, Jarken.,He, Yu-Xin.,Li, Da-Lei.,...&Guo, Wei-Hua.(2016).The global chemical properties of high-mass star forming clumps at different evolutionary stages.ASTROPHYSICS AND SPACE SCIENCE,361(6),191.
MLA Zhang, Yan-Jun,et al."The global chemical properties of high-mass star forming clumps at different evolutionary stages".ASTROPHYSICS AND SPACE SCIENCE 361.6(2016):191.
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