The UMIST database for astrochemistry 2012

TL;DR

The UMIST Database for Astrochemistry 2012 release provides an extensive, updated reaction network with new reactions, rate coefficients, and model testing results for astrochemical research.

Contribution

This release introduces a significantly expanded reaction network with new species, reactions, and data updates, enhancing astrochemical modeling capabilities.

Findings

Validated reaction network with dark cloud and circumstellar models

Inclusion of 1171 new anion reactions and deuterated data

Updated photorates and surface binding energies

Abstract

We present the fifth release of the UMIST Database for Astrochemistry (UDfA). The new reaction network contains 6173 gas-phase reactions, involving 467 species, 47 of which are new to this release. We have updated rate coefficients across all reaction types. We have included 1171 new anion reactions and updated and reviewed all photorates. In addition to the usual reaction network, we also now include, for download, state-specific deuterated rate coefficients, deuterium exchange reactions and a list of surface binding energies for many neutral species. Where possible, we have referenced the original source of all new and existing data. We have tested the main reaction network using a dark cloud model and a carbon-rich circumstellar envelope model. We present and briefly discuss the results of these models.