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Evolutionary Models of Interstellar Chemistry

Published online by Cambridge University Press:  04 August 2017

Sheo S. Prasad
Sheo S. Prasad*
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, 4800 Dak Grove Drive Pasadena, California 91109 USA

Abstract

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The goal of evolutionary models of interstellar chemistry is to understand how interstellar clouds came to be the way they are, how they will change with time, and to place them in an evolutionary sequence with other celestial objects such as stars. To this end, we present an improved Mark II version of our earlier model of chemistry in dynamically evolving clouds. The Mark II model suggests that the conventional elemental C/O ratio less than one can explain the observed abundances of CI and the non-detection of O2 in dense clouds. Coupled chemical-dynamical models seem to have the potential to generate many observable discriminators of the evolutionary tracks. This is exciting, because, in general, purely dynamical models do not yield enough verifiable discriminators of the predicted tracks.

Type
Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 120: Astrochemistry , 1987 , pp. 259 - 272
Copyright
Copyright © Reidel 1987 

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