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Preprint typeset using L ATEX style emulateapj v. 6/22/04 COMPARISONS OF AN EVOLUTIONARY CHEMICAL MODEL WITH OTHER MODELS

By Jeong-eun Lee, Neal J. Evans Ii and Edwin A. Bergin

Abstract

We compare an evolutionary chemical model with simple empirical models of the abundance and with static chemical models. We focus on the prediction of molecular line profiles that are commonly observed in low mass star forming cores. We show that empirical models can be used to constrain evaporation radii and infall radii using lines of some species. Species with more complex abundance profiles are not well represented by the empirical models. Static chemical models produce abundance profiles different from those obtained from an evolutionary calculation because static models do not account for the flow of matter inward from the outer regions. The resulting profiles of lines used to probe infall may differ substantially. Subject headings: ISM: astrochemistry – ISM: molecules – stars: formatio

Year: 2008
OAI identifier: oai:CiteSeerX.psu:10.1.1.316.6128
Provided by: CiteSeerX
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