Comparisons of an Evolutionary Chemical Model with Other Models

Details Comparisons of an Evolutionary Chemical Model with Other Models Comparisons of an Evolutionary Chemical Model with Other Models

2005-06-03

arxiv.org/abs/astro-ph/0506086v1

Astrophys.J. 631 (2005) 351-360

Astronomy and Astrophysics

Astrophysics

13 pages, 12 figures, To be published in the Astrophysical Journal

Scientific paper

10.1086/432531

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.

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