The IRAS Vela shell: a "super shell" in the making?

Rajagopal, Jayadev; Srinivasan, G.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2441

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DC Field	Value	Language
dc.contributor.author	Rajagopal, Jayadev	-
dc.contributor.author	Srinivasan, G.	-
dc.date.accessioned	2007-05-25T09:08:42Z	-
dc.date.available	2007-05-25T09:08:42Z	-
dc.date.issued	1999	-
dc.identifier.citation	IAU Symposium, 1999, Vol.190, p160	en
dc.identifier.isbn	1-58381-021-8	-
dc.identifier.uri	http://hdl.handle.net/2289/2441	-
dc.description	Open Access. New Views of the Magellanic Clouds, IAU Symposium #190, Eds. Y.-H. Chu, N. Suntzeff, J. Hesser, & D. Bohlender. 1999.	en
dc.description.abstract	The IRAS Vela shell was first seen as a ring of infrared emission in the IRAS maps of the Gum-Vela region coincident with the Gum Nebula. We have studied the kinematics of the molecular material (12CO) associated with the IRAS point sources and Southern Dark Clouds seen in this region and established the presence of a giant expanding Shell of molecular gas. The estimated mass, size and expansion velocity of the Shell lead us to conclude that it is the remnant of a GMC, in the process of disintegration through the influence of a central OB association (Vela OB2). This scenario is further strengthened by various other phenomena seen in the region like enhanced star formation, globules with bright rims, clumpy nature of the molecular gas etc., all of which indicate the disruption of a molecular cloud. We conjecture that the IRAS Vela Shell is a nearby example of a ``super shell'' in its early stages of evolution and as such is an ideal opportunity to study these objects now widely seen both in our Galaxy and in new observations of the Magellanic Clouds. We present our observations and conclusions and also comment on the possible evolution of the Shell into a system of star forming complexes like the Gould's belt.	en
dc.format.extent	120324 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	Astronomical Society of the Pacific	en
dc.relation.uri	http://adsabs.harvard.edu/cgi-bin/bib_query?1999IAUS..190..160R	en
dc.rights	1999 Astronomical Society of the Pacific	en
dc.title	The IRAS Vela shell: a "super shell" in the making?	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

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