J/A+AS/121/139ivo://CDS.VizieR/J/A+AS/121/139CDSMillar T.J.Farquhar P.R.A.Willacy K.2001-01-20T14:55:10Z2001-01-20T15:54:48ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fratomic-physicsinterstellar-mediumWe 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, Millar et al. 1991A&AS...87..585M) 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.1997A&AS..121..139Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/121/139CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/121/139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/121/139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/121/139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/121/139https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/121/139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/121/139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+AS/121/139/refsReferences of rate95.datrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.refcharBibCodeBibCodemeta.bib.bibcodecharAutAuthor namesmeta.bib.authorcharComCommentsmeta.notecharJ/A+AS/121/139/rate95Reactions and their rate coefficients (updated 5/03/96, table 4 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIReaction number (1)meta.numberintR1First reactantphys.atmol.elementcharR2Second reactant (2)phys.atmol.elementcharP1First reaction productphys.atmol.elementcharP2Second reaction productphys.atmol.elementcharP3Third reaction productphys.atmol.elementcharP44th reaction productphys.atmol.elementcharalpha{alpha} coefficient (3)stat.fit.paramdoublebeta{beta} coefficient (3)stat.fit.paramfloatgamma{gamma} coefficientstat.fit.paramdoubleM[M] M: rate coefficient measured in laboratory or deduced (4)stat.fit.paramcharTRType of reaction (5)meta.notecharEA[EA] relevance of a reaction (6)meta.notecharq_I[1/5]? Accuracy of the data (7)meta.code.qualintnullabler_ISource of the data in refs.dat file (8)meta.refcharJ/A+AS/121/139/dipole94Electric dipole moments for neutral molecules contained in the reaction library (last update 12-06-95, table 3 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpeciesSpecies (1)phys.atmol.elementcharl_muLimit flag on mumeta.code.errorcharmu? Electric dipole momentDphys.mol.dipolefloatnullableNoteNotes (2)meta.notecharJ/A+AS/121/139/heats94*Heats of formation for interstellar speciesn_FHiso2[&] Note on FHiso2 (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpeciesSpeciesphys.atmol.elementcharFH298K? Formation heat at 298K (in kJ/mole)kJ/molphys.mol.formationHeatfloatnullableFH0K? Formation heat at 0K (in kJ/mole)kJ/molphys.mol.formationHeatfloatnullablee_FH0K? rms uncertainty on FH0KkJ/molstat.errorfloatnullablen_FH0K[*&] Note on FH0K (1)meta.notecharFHiso1? Formation heat for first isomerkJ/molphys.mol.formationHeatfloatnullablee_FHiso1? rms uncertainty on FHiso1kJ/molstat.errorintnullablen_FHiso1[&] Note on FHiso1 (1)meta.notecharr_FHiso1[1]? 1: FHiso1 from Gingerich et al. 1994, JACS, 116, 3384meta.refintnullableFHiso2? Formation heat for second isomerkJ/molphys.mol.formationHeatfloatnullableSeqSequential numbermeta.idint