PMO OpenIR
Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region
Zhang, Chao1,2,3; Wu, Yuefang3,4; Liu, Xunchuan3,4; Qin, Sheng-li1,2; Liu, Tie5; Yuan, Jinghua6; Li, Di7,8; Meng, Fanyi9; Zhang, Tianwei9; Tang, Mengyao1,2; Yuan, Lixia6; Zhou, Chenlin6; Esimbek, Jarken10,11; Zhou, Yan1,2; Chen, Ping3,4; Hu, Runjie3
2020-03-01
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN0067-0049
Volume247Issue:1Pages:17
Corresponding AuthorZhang, Chao(chaozhangchz@163.com)
AbstractSixty-five Planck Galactic cold clumps (PGCCs) from the first quadrant (IQuad) and 39 from the anticenter direction region (ACent) were observed in 12CO, 13CO, and C18O J.=.1-0 lines using the 13.7 m telescope of the Purple Mountain Observatory. All the targets were detected in all three lines, except for 12 IQuad and 8 ACent PGCCs without C18O detection. Seventy-six and 49 velocity components were obtained in IQuad and ACent respectively; 146 cores were extracted from 76 IQuad clumps and 100 cores from 49 ACent clumps. The average Tex of IQuad cores and ACent cores is 12.4 K and 12.1 K, respectively. The average line widths of 13CO of IQuad cores and ACent cores are 1.55 km s-1 and 1.77 km s-1, respectively. Among the detected cores, 24 in IQuad and 13 in ACent have asymmetric line profiles. The small blue excesses,.0.03 in IQuad and 0.01 in ACent, indicate that star formation is not active in these PGCC cores. Power-law fittings of the core mass function to the high-mass end give indices of -0.57 in IQuad and -1.02 in ACent, which are flatter than the slope of the initial mass function given by Salpeter. The large turnover masses of 28 M. for IQuad cores and 77 M. for ACent cores suggest low star formation efficiencies in PGCCs. The correlation between virial mass and gas mass indicates that most PGCC cores in both regions are not likely pressure-confined.
DOI10.3847/1538-4365/ab720b
WOS KeywordDENSE MOLECULAR CORES ; INITIAL MASS FUNCTION ; STAR-FORMATION ; DARK CLOUDS ; LUMINOSITY FUNCTION ; COLLAPSE ; YOUNG ; ORION ; POPULATION ; EXTINCTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000519879700001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/36076
Collection中国科学院紫金山天文台
Corresponding AuthorZhang, Chao
Affiliation1.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China
2.Key Lab Particle Astrophys Yunnan Prov, Kunming 650091, Yunnan, Peoples R China
3.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
5.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
6.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
7.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100012, Peoples R China
8.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr NUCAC, ZA-4000 Durban, South Africa
9.Univ Cologne, Phys Inst 1, Zulpicher Str 77, D-50937 Cologne, Germany
10.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
11.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Chao,Wu, Yuefang,Liu, Xunchuan,et al. Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2020,247(1):17.
APA Zhang, Chao.,Wu, Yuefang.,Liu, Xunchuan.,Qin, Sheng-li.,Liu, Tie.,...&Hu, Runjie.(2020).Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,247(1),17.
MLA Zhang, Chao,et al."Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 247.1(2020):17.
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