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Evolutionary Models of Interstellar Chemistry

Published online by Cambridge University Press:  07 August 2017

Sheo S. Prasad
Sheo S. Prasad*
Affiliation:
Lockheed Palo Alto Research Laboratory (O/91-20, B255) 3251 Hanover Street, Palo Alto, CA 94304, USA

Abstract

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Evolutionary chemical models are ultimately unavoidable for a full understanding of interstellar clouds. They include not only the chemical processes but also the dynamical processes by which the modeled object came to be the way it is. From an evolutionary perspective, dark cores may be ephemeral objects and dynamical equilibrium an exception rather than norm. Evolutionary models have numerous advantages over “classical” fixed condition equilibrium models. They have the potential to provide more elegant explanations for the observed inter-cloud and intra-cloud chemical differences. The problem of the depletion of gas phase molecules by condensation onto the grain may also be less serious in evolutionary models. Hence, these models should be actively developed.

Type
Quiescent Clouds and Regions of Star Formation
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 205 - 210
Copyright
Copyright © Kluwer 1992 

References

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