EDP Sciences
Free access
Issue
A&A
Volume 432, Number 1, March II 2005
Page(s) 369 - 379
Section Atomic, molecular and nuclear data
DOI http://dx.doi.org/10.1051/0004-6361:20041729


A&A 432, 369-379 (2005)
DOI: 10.1051/0004-6361:20041729

An atomic and molecular database for analysis of submillimetre line observations ,

F. L. Schöier1, 2, F. F. S. van der Tak3, E. F. van Dishoeck2 and J. H. Black4

1  Stockholm Observatory, AlbaNova, 106 91 Stockholm, Sweden
    e-mail: fredrik@astro.su.se
2  Leiden Observatory, PO Box 9513, 2300 RA Leiden, The Netherlands
3  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
4  Onsala Space Observatory, 439 92 Onsala, Sweden

(Received 26 July 2004 / Accepted 4 November 2004)

Abstract
Atomic and molecular data for the transitions of a number of astrophysically interesting species are summarized, including energy levels, statistical weights, Einstein A-coefficients and collisional rate coefficients. Available collisional data from quantum chemical calculations and experiments are extrapolated to higher energies (up to $E/k \sim 1000$ K). These data, which are made publically available through the WWW at http://www.strw.leidenuniv.nl/~moldata, are essential input for non-LTE line radiative transfer programs. An online version of a computer program for performing statistical equilibrium calculations is also made available as part of the database. Comparisons of calculated emission lines using different sets of collisional rate coefficients are presented. This database should form an important tool in analyzing observations from current and future (sub)millimetre and infrared telescopes.


Key words: astronomical data bases: miscellaneous -- atomic data -- molecular data -- radiative transfer -- ISM: atoms -- ISM: molecules

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