NAOC Open IR
astatisticalstudytowardshighmassbgpsclumpswiththemalt90survey
Liu Xiaolan1; Xu Jinlong1; Ning Changchun2; Zhang Chuanpeng1; Liu Xiaotao3
2018
Source Publicationresearchinastronomyandastrophysics
ISSN1674-4527
Volume000Issue:001Pages:4
AbstractIn 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),HN13C(1–0),H13CO+(1–0),C2H(1–0),HC3N(10–9),SiO(2–1),13CS(2–1)and HNCO(44,0-30,3))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 ratiosN2H+/HCO+and log(HC3N/HCO+)decline with log(HCO+)as two linear functions,respectively.This suggests that N+2H+ and HC3N transform to HCOas 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 10-3M⊙yr-1.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/47825
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.西藏大学
3.华中师范大学
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu Xiaolan,Xu Jinlong,Ning Changchun,et al. astatisticalstudytowardshighmassbgpsclumpswiththemalt90survey[J]. researchinastronomyandastrophysics,2018,000(001):4.
APA Liu Xiaolan,Xu Jinlong,Ning Changchun,Zhang Chuanpeng,&Liu Xiaotao.(2018).astatisticalstudytowardshighmassbgpsclumpswiththemalt90survey.researchinastronomyandastrophysics,000(001),4.
MLA Liu Xiaolan,et al."astatisticalstudytowardshighmassbgpsclumpswiththemalt90survey".researchinastronomyandastrophysics 000.001(2018):4.
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