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dc.contributor.authorRimmer, Paul
dc.contributor.authorHelling, Christiane
dc.identifier.citationRimmer , P & Helling , C 2016 , ' A chemical kinetics network for lightning and life in planetary atmospheres ' , Astrophysical Journal Supplement Series , vol. 224 , no. 1 , 9 .
dc.identifier.otherPURE: 240205514
dc.identifier.otherPURE UUID: 9d4bf4a6-f9c6-4d5c-b382-9b51622acb0c
dc.identifier.otherScopus: 84977639213
dc.identifier.otherWOS: 000377050200009
dc.description.abstractThere 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 K and 30,000 K. 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 (1993) for CO2, H2, CO, and O2, 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.
dc.relation.ispartofAstrophysical Journal Supplement Seriesen
dc.rightsCopyright © 2016, The American Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at
dc.subjectAtmospheric effectsen
dc.subjectMolecular processesen
dc.subjectPlanetary systemsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleA chemical kinetics network for lightning and life in planetary atmospheresen
dc.typeJournal articleen
dc.contributor.sponsorEuropean Research Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden
dc.identifier.grantnumber257431 257431en

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