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19 April 2024

» arxiv » astro-ph/0410653

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Molecular abundance ratios as a tracer of accelerated collapse in regions of high mass star formation?
C. J. Lintott ; S.Viti ; J. M. C. Rawlings ; D. A. Williams ; T. W. Hartquist ; P. Caselli ; I. Zinchenko ; P. Myers ;
Date:	27 Oct 2004
Journal:	Astrophys.J. 620 (2005) L795 DOI: 10.1086/427164
Subject:	astro-ph
Abstract:	Recent observations suggest that the behaviour of tracer species such as N_2H+ and CS is significantly different in regions of high and low mass star formation. In the latter, N_2H+ is a good tracer of mass, while CS is not. Observations show the reverse to be true in high-mass star formation regions. We use a computational chemical model to show that the abundances of these and other species may be significantly altered by a period of accelerated collapse in high mass star forming regions. We suggest these results provide a potential explanation of the observations, and make predictions for the behaviour of other species.
Source:	arXiv, astro-ph/0410653
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