NAOC Open IR
The Properties of Planck Galactic Cold Clumps in the L1495 Dark Cloud
Tang, Mengyao1,2; Liu, Tie3,4,5; Qin, Sheng-Li1,2; Kim, Kee-Tae3,4; Wu, Yuefang6; Tatematsu, Ken'ichi7; Yuan, Jinghua8; Wang, Ke9; Parsons, Harriet5; Koch, Patrick M.10; Sanhueza, Patricio7; Ward-Thompson, D.11; Toth, L. Viktor12,13; Soam, Archana3,4; Lee, Chang Won3,4,14; Eden, David15; Di Francesco, James16,17; Rawlings, Jonathan18; Rawlings, Mark G.5; Montillaud, Julien19; Zhang, Chuan-Peng19; Cunningham, M. R.20
2018-04-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume856Issue:2Pages:21
AbstractPlanck Galactic Cold Clumps (PGCCs) possibly represent the early stages of star formation. To understand better the properties of PGCCs, we studied 16 PGCCs in the L1495 cloud with molecular lines and continuum data from Herschel, JCMT/SCUBA-2, and the PMO 13.7 m telescope. Thirty dense cores were identified in 16 PGCCs from 2D Gaussian fitting. The dense cores have dust temperatures of T-d = 11-14 K, and H-2 column densities of NH2 = (0.36-2.5) x 10(22) cm(-2). We found that not all PGCCs contain prestellar objects. In general, the dense cores in PGCCs are usually at their earliest evolutionary stages. All the dense cores have non-thermal velocity dispersions larger than the thermal velocity dispersions from molecular line data, suggesting that the dense cores may be turbulence-dominated. We have calculated the virial parameter a and found that 14 of the dense cores have alpha < 2, while 16 of the dense cores have alpha > 2. This suggests that some of the dense cores are not bound in the absence of external pressure and magnetic fields. The column density profiles of dense cores were fitted. The sizes of the flat regions and core radii decrease with the evolution of dense cores. CO depletion was found to occur in all the dense cores, but is more significant in prestellar core candidates than in protostellar or starless cores. The protostellar cores inside the PGCCs are still at a very early evolutionary stage, sharing similar physical and chemical properties with the prestellar core candidates.
KeywordISM: clouds ISM: individual objects (L1495) ISM: molecules stars: formation
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Top Talents Program of Yunnan Province ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG) ; OTKA ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Top Talents Program of Yunnan Province ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG) ; OTKA ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Top Talents Program of Yunnan Province ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG) ; OTKA ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Top Talents Program of Yunnan Province ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG) ; OTKA ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences
DOI10.3847/1538-4357/aaadad
WOS KeywordGOULD BELT SURVEY ; CLERK MAXWELL TELESCOPE ; MOLECULAR CLOUD ; STAR-FORMATION ; DENSE CORES ; SCUBA-2 OBSERVATIONS ; PROTOSTELLAR CORES ; PRESTELLAR CORES ; TAURUS ; JCMT
Language英语
Funding ProjectNational Key R&D Program of China[2017YFA0402701] ; National Natural Science Foundation of China (NSFC)[U1631237] ; Top Talents Program of Yunnan Province[2015HA030] ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG)[WA3628-1/1] ; German Research Foundation (DFG)[1573] ; OTKA[NN-111016] ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS)[U1631237] ; Chinese Academy of Sciences[XDB09000000]
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Top Talents Program of Yunnan Province ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG) ; OTKA ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Top Talents Program of Yunnan Province ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG) ; OTKA ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Top Talents Program of Yunnan Province ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG) ; OTKA ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Top Talents Program of Yunnan Province ; KASI fellowship ; EACOA fellowship ; German Research Foundation (DFG) ; OTKA ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000429040600015
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/35604
Collection中国科学院国家天文台
Corresponding AuthorTang, Mengyao
Affiliation1.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China
2.Key Lab Astroparticle Phys Yunnan Prov, Kunming 650091, Yunnan, Peoples R China
3.Korea Astron, 776 Daedeokdaero, Daejeon 34055, South Korea
4.Space Sci Inst, 776 Daedeokdaero, Daejeon 34055, South Korea
5.East Asian Observ, 660 N Aohoku Pl, Hilo, HI 96720 USA
6.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
7.Natl Inst Nat Sci, Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
8.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
9.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
10.Acad Sinica, Inst Astron & Astrophys, Taipei, Taiwan
11.Univ Cent Lancashire, Jeremiah Horrocks Inst Math Phys & Astron, Preston PR1 2HE, Lancs, England
12.Eotvos Lorand Univ, Dept Astron, Pazmany Peter Setany 1-A, H-1117 Budapest, Hungary
13.Hungarian Acad Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary
14.Univ Sci & Technol, 176 Gajeong Dong, Daejeon, South Korea
15.Liverpool John Moores Univ, Astrophys Res Inst, IC2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England
16.NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada
17.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada
18.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
19.Univ Bourgogne Franche Comte, CNRS, UMR 6213, Inst UTINAM, Besancon, France
20.Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia
Recommended Citation
GB/T 7714
Tang, Mengyao,Liu, Tie,Qin, Sheng-Li,et al. The Properties of Planck Galactic Cold Clumps in the L1495 Dark Cloud[J]. ASTROPHYSICAL JOURNAL,2018,856(2):21.
APA Tang, Mengyao.,Liu, Tie.,Qin, Sheng-Li.,Kim, Kee-Tae.,Wu, Yuefang.,...&Cunningham, M. R..(2018).The Properties of Planck Galactic Cold Clumps in the L1495 Dark Cloud.ASTROPHYSICAL JOURNAL,856(2),21.
MLA Tang, Mengyao,et al."The Properties of Planck Galactic Cold Clumps in the L1495 Dark Cloud".ASTROPHYSICAL JOURNAL 856.2(2018):21.
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