Molecular abundance ratios as a tracer of accelerated collapse in regions of high-mass star formation

Molecular abundance ratios as a tracer of accelerated collapse in regions of high-mass star formation

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Recent observations suggest that the behavior of tracer species such as N2H+ and CS is significantly different in regions of high- and low-mass star formation. In the latter, N2H+ is a good tracer of mass, while CS is not. Observations show the reverse to be true in high-mass star formation regions....

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Bibliographic Details
Main Authors: Lintott, C, Viti, S, Rawlings, J, Williams, D, Hartquist, T, Caselli, P, Zinchenko, I, Myers, P
Format: Journal article
Language:English
Published: Institute of Physics Publishing 2005
Description
Summary:Recent observations suggest that the behavior of tracer species such as N2H+ and CS is significantly different in regions of high- and low-mass star formation. In the latter, N2H+ 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 that these results provide a potential explanation of the observations, and make predictions for the behavior of other species. © 2005. The American Astronomical Society. All rights reserved.

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