The UMIST database for astrochemistry 2012

By D. McElroy, C. Walsh, A. Markwick, M. Cordiner, Kenneth W. Smith, T. Millar. 2012

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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.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/987a42cc5a8d7c8536e7e5a308b1ba6aa15d454f

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Citations in the corpus

RADIATION MAGNETOHYDRODYNAMIC SIMULATIONS OF PROTOSTELLAR COLLAPSE: NONIDEAL MAGNETOHYDRODYNAMIC EFFECTS AND EARLY FORMATION OF CIRCUMSTELLAR DISKS (2015, methodology): “We adopt the reaction rates from the UMIST RATE 2012 database (McElroy et al. 2013).”
THE DARK MOLECULAR GAS (2010, background): “…to dust grains (the dust cross section per H nucleus is contained in γ1), xOn = n(O) is the density of O atoms in the gas, I ′OH = 3.5× 10−10 s−1 (Roberge et al. 1991; Woodall et al. 2007) is the (unshielded) photodissociation rate of OH in the local (Draine) interstellar field, G′0 is the…”
A KINETIC DATABASE FOR ASTROCHEMISTRY (KIDA) (2012, methodology): “The better known is the udfa database (previously called the UMIST database), created by Tom Millar (Queen’s University of Belfast, Northern Ireland), first released in 1991 (Millar et al. 1991, 1997; Le Teuff et al. 2000; Woodall et al. 2007).”
The molecular composition of the planet-forming regions of protoplanetary disks across the luminosity regime (2015, methodology): “Only the formation of NH (via N + H2) possesses a substantial reaction barrier (18,095 K, McElroy et al. 2013).”
The warm gas atmosphere of the HD 100546 disk seen by Herschel - Evidence of a gas-rich, carbon-poor atmosphere? (2012, methodology): “Our network contains all reactions from the UMIST 2006 database (Woodall et al. 2007) involving the species given in Table A.2.”
Formation of Complex Molecules in Prestellar Cores: A Multilayer Approach (2017, background): “Interestingly, channel (13) is added to the UDFA12 database (McElroy et al. 2013), but is absent in KIDA database (Wakelam et al. 2015).”
Physical Processes in the Interstellar Medium (2014, background): “…+ H2→ CH+2 +γ. (178) The rate coefficient for this reaction is significantly larger than the rate coefficient for reaction (177) as discussed by McElroy et al. (2013), and so in regions with nH2 ≥ nH, this reaction is usually the main starting point for the formation of CO via the…”
The Nine Lives of Cosmic Rays in Galaxies (2015, methodology): “…Dalgarno & Lepp 1987) and approximate expressions for the resulting photo-rates in the ISM have been incorporated into widely used chemical reaction networks (e.g. the UMIST database for astrochemistry5 McElroy et al. (2013) and the Kinetic Database for Astrochemistry, KIDA6, Wakelam et al. 2012).”
Survival of molecular gas in cavities of transition disks - I. CO (2013, methodology): “The reaction network is based on a subset of the UMIST 06 network (Woodall et al. 2007) and consists of ∼110 species and ∼1500 reactions.”
Global Simulations of the Inner Regions of Protoplanetary Disks with Comprehensive Disk Microphysics (2017, methodology): “Since Bai (2014), we have extracted gas-phase reactions from 2012 UMIST database described in McElroy et al. (2013), adopting the updated rate coefficients from the new database.”
Chemical modeling of L183 (= L134N) : an estimate of the ortho/para H2 ratio (2008, methodology): “The University of Manchester Institute of Science and Technology (UMIST) Database for Astrochemistry contains information on 4500 reactions of which 35% have been measured experimentally, some at temperatures down to 20 K (Woodall et al. 2007).”