Universität zu Köln

Zhang, Chao ORCID: 0000-0002-5682-2906, Wu, Yuefang, Liu, Xunchuan ORCID: 0000-0001-8315-4248, Qin, Sheng-li, Liu, Tie ORCID: 0000-0002-5286-2564, Yuan, Jinghua, Li, Di, Meng, Fanyi, Zhang, Tianwei ORCID: 0000-0002-1466-3484, Tang, Mengyao, Yuan, Lixia, Zhou, Chenlin, Esimbek, Jarken, Zhou, Yan, Chen, Ping ORCID: 0000-0003-0853-6427 and Hu, Runjie (2020). Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region. Astrophys. J. Suppl. Ser., 247 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4365

Full text not available from this repository.

Abstract

Sixty-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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhang, Chao UNSPECIFIED orcid.org/0000-0002-5682-2906 UNSPECIFIED Wu, Yuefang UNSPECIFIED UNSPECIFIED UNSPECIFIED Liu, Xunchuan UNSPECIFIED orcid.org/0000-0001-8315-4248 UNSPECIFIED Qin, Sheng-li UNSPECIFIED UNSPECIFIED UNSPECIFIED Liu, Tie UNSPECIFIED orcid.org/0000-0002-5286-2564 UNSPECIFIED Yuan, Jinghua UNSPECIFIED UNSPECIFIED UNSPECIFIED Li, Di UNSPECIFIED UNSPECIFIED UNSPECIFIED Meng, Fanyi UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhang, Tianwei UNSPECIFIED orcid.org/0000-0002-1466-3484 UNSPECIFIED Tang, Mengyao UNSPECIFIED UNSPECIFIED UNSPECIFIED Yuan, Lixia UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhou, Chenlin UNSPECIFIED UNSPECIFIED UNSPECIFIED Esimbek, Jarken UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhou, Yan UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, Ping UNSPECIFIED orcid.org/0000-0003-0853-6427 UNSPECIFIED Hu, Runjie UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-342963
DOI:	10.3847/1538-4365/ab720b
Journal or Publication Title:	Astrophys. J. Suppl. Ser.
Volume:	247
Number:	1
Date:	2020
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1538-4365
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DENSE MOLECULAR CORES; INITIAL MASS FUNCTION; STAR-FORMATION; DARK CLOUDS; LUMINOSITY FUNCTION; COLLAPSE; YOUNG; ORION; POPULATION; EXTINCTION Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/34296