J/ApJS/224/9ivo://CDS.VizieR/J/ApJS/224/9doi:10.26093/cds/vizier.22240009CDSRimmer P.B.Helling C.2017-01-23T22:00:00Z2016-07-27T12:52:37ZCDS support team

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

cds-question@unistra.fratomic-physicsastronomical-reference-materialsThere are many open questions about prebiotic chemistry in both planetary and exoplanetary environments. The increasing number of known exoplanets and other ultra-cool, substellar objects has propelled the desire to detect life and prebiotic chemistry outside the solar system. We present an ion-neutral chemical network constructed from scratch, Stand2015, that treats hydrogen, nitrogen, carbon, and oxygen chemistry accurately within a temperature range between 100 and 30000K. Formation pathways for glycine and other organic molecules are included. The network is complete up to H6C2N2O3. Stand2015 is successfully tested against atmospheric chemistry models for HD 209458b, Jupiter, and the present-day Earth using a simple one-dimensional photochemistry/diffusion code. Our results for the early Earth agree with those of Kasting for CO_2_, H_2_, CO, and O_2_, but do not agree for water and atomic oxygen. We use the network to simulate an experiment where varied chemical initial conditions are irradiated by UV light. The result from our simulation is that more glycine is produced when more ammonia and methane is present. Very little glycine is produced in the absence of any molecular nitrogen and oxygen. This suggests that the production of glycine is inhibited if a gas is too strongly reducing. Possible applications and limitations of the chemical kinetics network are also discussed.2016ApJS..224....9Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/224/9CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/761/166 : Terrestrial exoplanet atmospheres. I. (Hu+, 2012)J/ApJ/649/1043 : Transiting extrasolar planet HD 209458b (Richardson+, 2006)J/A+AS/109/125 : Photoionisation cross section (Verner+, 1995)http://kida.obs.u-bordeaux1.fr/ : Kinetic Database for Astrochemistryhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/224/9https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/224/9http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/224/9https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/224/9https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/224/9http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/224/9GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJS/224/9/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.note;meta.maincharprimaryBibCodeBibcode if anymeta.bib.bibcodecharAuthFirst author's name(s)meta.bib.authorcharCommCommentmeta.notecharJ/ApJS/224/9/table4Neutral species included in the Stand2015 networkrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNewNetwork Formulaphys.atmol.elementStdStandard Formulaphys.atmol.elementNameMolecule identifiermeta.id;phys.molcharDataThermochem data source ("Burcat", "Benson" or "NASA-CEA") (1)meta.bibcharJ/ApJS/224/9/table6Stand2015 chemical kinetics networkf_gammaFlag on gamma (3)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIndex numbermeta.id;meta.mainintTypeType (1)phys.atmolcharReactionReactionmeta.notecharalpha? The {alpha} value (2)stat.fit.paramdoublenullablebeta[-19.7/12.4]? The {beta} valuestat.fit.paramfloatnullablegamma[0/129000]? The {gamma} valuestat.fit.paramintnullableRefReference (see refs.dat file)meta.ref;pos.framechar