Kinematics of the young stellar objects associated with the cometary globules in the Gum Nebula

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/4443

Title:	Kinematics of the young stellar objects associated with the cometary globules in the Gum Nebula
Authors:	Choudhury, R Bhatt, H. C
Keywords:	Stars: Pre-Main-Sequence Kinematics ISM: Globules Clouds and HII Regions: Individual: Gum Nebula
Issue Date:	Mar-2009
Publisher:	Royal Astronomical Society
Citation:	Monthly Notices of the Royal Astronomical Society, Vol. 393, No. 3, pp. 959 - 968
Abstract:	An analysis of the proper motion measurements of the young stellar objects (YSOs) associated with the cometary globules (CGs) in the Gum Nebula is presented. While earlier studies based on the radial-velocity measurements of the CGs suggested expansion of the system of the CGs, the observed proper motion of the YSOs shows no evidence for expansion. In particular, the kinematics of two YSOs embedded in CGs are inconsistent with the supernova explosion of the companion of ζ Pup, about 1.5 Myr ago being the cause of the expansion of the system of the CGs. YSOs associated with the CGs share the average proper motion of the member stars of the Vela OB2 association. A few YSOs that have relatively large proper motions are found to show relatively low infrared excesses.
Description:	The original publication is available at
URI:	http://hdl.handle.net/2248/4443
ISSN:	0004-637X
Appears in Collections:	IIAP Publications

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