📄 The UMIST database for astrochemistry 2006
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Woodall, J. et al. (2007) · Astronomy and Astrophysics
Reads: 2 · Citations: 506
DOI: 10.1051/0004-6361:20064981
🔗 https://ui.adsabs.harvard.edu/abs/2007A&A...466.1197W/abstract
#Astronomy #Astrophysics #AstroSoftware #MolecularData #MolecularProcesses
The UMIST database for astrochemistry 2006
Aims:We present a new version of the UMIST Database for Astrochemistry, the fourth such version to be released to the public. The current version contains some 4573 binary gas-phase reactions, an increase of 10% from the previous (1999) version, among 420 species, of which 23 are new to the database. <BR />Methods: Major updates have been made to ion-neutral reactions, neutral-neutral reactions, particularly at low temperature, and dissociative recombination reactions. We have included for the first time the interstellar chemistry of fluorine. In addition to the usual database, we have also released a reaction set in which the effects of dipole-enhanced ion-neutral rate coefficients are included. <BR />Results: These two reactions sets have been used in a dark cloud model and the results of these models are presented and discussed briefly. The database and associated software are available on the World Wide Web at www.udfa.net. <P />Tables 1, 2, 4 and 9 are only available in electronic form at http://www.aanda.org
📄 The UMIST database for astrochemistry 2012
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McElroy, D. et al. (2013) · Astronomy and Astrophysics
Reads: 84 · Citations: 833
DOI: 10.1051/0004-6361/201220465
🔗 https://ui.adsabs.harvard.edu/abs/2013A&A...550A..36M/abstract
#Astronomy #Astrophysics #Astrochemistry #MolecularData #MolecularProcesses
The UMIST database for astrochemistry 2012
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. <P />All codes, along with reaction networks and data files, are accessible at <A href="http://www.udfa.net">http://www.udfa.net</A>.
Researchers describe the first molecular processes in the eye when light hits the retina
Researchers at the Paul Scherrer Institute PSI have deciphered the molecular processes that first occur in the eye when light hits the retina. The processes—which take only a fraction of a trillionth of a second—are essential for human sight. The study has now been published in the scientific journal Nature.
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