Universität zu Köln

Liu, Tie ORCID: 0000-0002-5286-2564, Wu, Yuefang, Wu, Jingwen, Qin, Sheng-Li and Zhang, Huawei ORCID: 0000-0002-7727-1699 (2013). Competitive accretion in the protocluster G10.6-0.4? Mon. Not. Roy. Astron. Soc., 436 (2). S. 1335 - 1343. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We present the results of high spatial resolution observations in the 1.1-mm waveband with the Submillimetre Array (SMA) towards the protocluster G10.6-0.4. The 1.1-mm continuum emission reveals seven dense cores. Redshifted absorption dips are seen in the HCN (3-2) lines in these cores, suggesting infalling of gas towards the dense cores. This is the first time that infall has been seen towards multiple sources in a protocluster. We also identified four infrared point sources in this region, which are most likely Class 0/I protostars. Two jet-like structures are also identified from Spitzer/Infrared Array Camera (IRAC) images. The dense core located in the centre has a much larger mass than the off-centre cores. The clump is in overall collapse and the infall motion is supersonic. The standard deviations of core velocities and the velocity differences between the cores and the cloud/clump are all larger than the thermal velocity dispersion. The picture of G10.6-0.4 seems to favour the 'competitive accretion' model, but this needs to be tested through further observations.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Liu, Tie UNSPECIFIED orcid.org/0000-0002-5286-2564 UNSPECIFIED Wu, Yuefang UNSPECIFIED UNSPECIFIED UNSPECIFIED Wu, Jingwen UNSPECIFIED UNSPECIFIED UNSPECIFIED Qin, Sheng-Li UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhang, Huawei UNSPECIFIED orcid.org/0000-0002-7727-1699 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-471575
DOI:	10.1093/mnras/stt1650
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	436
Number:	2
Page Range:	S. 1335 - 1343
Date:	2013
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CLUSTER-FORMING REGION; GRAVITATIONAL COLLAPSE; STAR-FORMATION; SPITZER-IRAC; OB CLUSTERS; INFALL; CORE; FLOW; OUTFLOW; MOTIONS Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47157