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A&A Supplement series, Vol. 121, January 1997, 139 - 185

Received February 12; accepted May 14, 1996

The UMIST Database for Astrochemistry 1995

T. J. Millar, P. R. A. Farquhar - K. Willacy

Send offprint request: T. J. Millar
Department of Physics, UMIST, P. O. Box 88, Manchester, M60 1QD, UK


We report the release of a new version of the UMIST database for astrochemistry. The database contains the rate coefficients of 3864 gas-phase reactions important in interstellar and circumstellar chemistry and involves 395 species and 12 elements. The previous (1990) version of this database has been widely used by modellers. In addition to the rate coefficients, we also tabulate permanent electric dipole moments of the neutral species and heats of formation. A numerical model of the chemical evolution of a dark cloud is calculated and important differences to that calculated with the previous database noted.

keywords: ISM: molecules - molecular data -- molecular processes

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