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A statistical study towards high-mass BGPS clumps with the MALT90 survey

文献类型：期刊论文

作者Liu, Xiao-Lan1,2; Xu, Jin-Long1,2; Ning, Chang-Chun3; Zhang, Chuan-Peng1,2; Liu, Xiao-Tao4
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2018
卷号18期号:1页码:28
关键词stars: formation ISM: abundance ISM: molecules radio lines: ISM ISM: kinematics and dynamics
ISSN号1674-4527
DOI10.1088/1674-4527/18/1/4
英文摘要In this work, we perform a statistical investigation towards 50 high-mass clumps using data from the Bolocam Galactic Plane Survey (BGPS) and Millimetre Astronomy Legacy Team 90-GHz survey (MALT90). Eleven dense molecular lines (N2H+(1-0), HNC(1-0), HCO+(1-0), HCN(1-0), (HNC)-C-13(1-0), (HCO+)-C-13(1-0), C2H(1-0), HC3N(10-9), SiO(2-1), (CS)-C-13(2-1) and HNCO (4(4,0)-3(0,3))) are detected. N2H+ and HNC are shown to be good tracers for clumps in various evolutionary stages since they are detected in all the fields. The detection rates of N-bearing molecules decrease as the clumps evolve, but those of O-bearing species increase with evolution. Furthermore, the abundance ratios [N2H+]/[HCO+] and log ([HC3N]/[HCO+]) decline with log ([HCO+]) as two linear functions, respectively. This suggests that N2H+ and HC3N transform to HCO+ as the clumps evolve. We also find that C2H is the most abundant molecule with an order of magnitude 10(-8). In addition, three new infall candidates, G010.214-00.324, G011.121-00.128 and G012.215-00.118(a), are discovered to have large-scale infall motions and infall rates with an order of magnitude 10(-3) M(circle dot)yr(-1).
WOS关键词INFRARED DARK CLOUDS ; STAR-FORMATION ; INFALL MOTIONS ; MOLECULAR-SPECTROSCOPY ; COMPETITIVE ACCRETION ; COLOGNE DATABASE ; METHANOL MASERS ; BOLOCAM ; REGIONS ; CORES
资助项目National Aeronautics and Space Administration ; National Natural Science Foundation of China[11363004] ; National Natural Science Foundation of China[11403042] ; National Key Basic Research Program of China[2015CB857100]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000428267100004
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
资助机构National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China
源URL[http://ir.bao.ac.cn/handle/114a11/37165]  
专题中国科学院国家天文台
通讯作者Liu, Xiao-Lan
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.NAOC TU Joint Ctr Astrophys, Lhasa 850000, Peoples R China
3.Tibet Univ, Lhasa 850000, Peoples R China
4.Cent China Normal Univ, Dept Finance, Wuhan 430079, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Xiao-Lan,Xu, Jin-Long,Ning, Chang-Chun,et al. A statistical study towards high-mass BGPS clumps with the MALT90 survey[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(1):28.
APA Liu, Xiao-Lan,Xu, Jin-Long,Ning, Chang-Chun,Zhang, Chuan-Peng,&Liu, Xiao-Tao.(2018).A statistical study towards high-mass BGPS clumps with the MALT90 survey.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(1),28.
MLA Liu, Xiao-Lan,et al."A statistical study towards high-mass BGPS clumps with the MALT90 survey".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.1(2018):28.

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