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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 198642.0, MPI für Astronomie / Publikationen_mpia
Reduction of chemical networks. I. The case of molecular clouds
Authors:Wiebe, D.; Semenov, D.; Henning, Th.
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Astronomy and Astrophysics
Journal Abbrev.:Astronomy and Astrophysics
Volume:399
Start Page:197
End Page:210
Review Status:not specified
Audience:Not Specified
Abstract / Description:We present a new method to analyse and reduce
chemical networks and apply this technique to the
chemistry in molecular clouds. Using the
technique, we investigated the possibility of
reducing the number of chemical reactions and
species in the UMIST 95 database simultaneously.
In addition, we did the same reduction but with
the ``objective technique'' in order to compare
both methods. We found that it is possible to
compute the abundance of carbon monoxide and
fractional ionisation accurately with
significantly reduced chemical networks in the
case of pure gas-phase chemistry. For gas-grain
chemistry involving surface reactions reduction
is not worthwhile. Compared to the ``objective
technique'' our reduction method is more
effective but more time-consuming as well.
Free Keywords:astrochemistry; stars: formation; molecular
; processes; ISM: molecules; ISM: abundances
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:Pyatnitskaya St. 48, 119017 Moscow, Russia
<EMAIL>dwiebe@inasan.rssi.ru</EMAIL>),
AB(Astrophysical Institute and University
Observatory, Schillergäßchen 2-3, 07745 Jena,
Germany <EMAIL>dima@astro.uni-jena.de</EMAIL>),
AC(Max Planck Institute for Astronomy, Königstuhl
17, 69117 Heidelberg, Germany
<EMAIL>henning@mpia.de</EMAIL>)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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