Modeling the chemical evolution and kinetics of pure H2O Ices under various types of radiation employing the PROCODA code

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dc.contributor.authorSilveira, Carolina Hahn da
dc.contributor.authorPilling, Sergio
dc.date.accessioned2025-02-10T14:58:36Z
dc.date.available2025-02-10T14:58:36Z
dc.date.issued22024
dc.description.abstractWater is one of the most abundant molecules in space, especially in cold environments, where it is the main constituting of astrophysical ices. The space ionizing radiation affects these ices and induces chemical changes, including desorption to gas-phase, which increase the complexity of the interstellar medium. In this work, we employed the PROCODA code to investigate the behavior of several pure water ices under different type of ionizing radiation such as UV, X-rays, electrons and cosmic rays analogues. Here, we employ molecular column densities from laboratory and solved a set of coupled chemical reactions to calculated effective reaction rates (ERCs) and characterize the chemical equilibrium of water ices under high radiation fluences. Briefly, we monitored the evolution of nine species (including the observed ones H2O, H2O2, and O3, and the predicted ones H, O, H2, OH, O2, and HO2). A discussion on the branching ratio for the considered reactions with the type of ionizing radiation is provided. Among the results, we observed that approximately 63% of the modeled molecules quantified at chemical equilibrium were non-observed species in the X-rays experiment, highlighting the importance of this work in providing insights into the processes that occur on the surface of icy interstellar grains exposed to cosmic radiation, including the formation and destruction of water ice. Accurate modeling of these processes can lead to a better understanding of the chemical evolution of interstellar and circumstellar environments, as well as offer insight into the formation and composition of celestial objects such as comets.
dc.description.physical21 p.
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.uriCNPq (#302985/2018-2; #302608/2022-2) CAPES (#PDPG/88887.691437/2022-00)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.bibliographicCitationSILVEIRA, Carolina Hahn da; PILLING, Sergio. Modeling the chemical evolution and kinetics of pure H2O Ices under various types of radiation employing the PROCODA code. Advances in Space Research, v. 73, n. 1, p. 1149-1169, 2024. Disponível em: https://linkinghub.elsevier.com/retrieve/pii/S0273117723008451.
dc.identifier.doi10.1016/j.asr.2023.10.027
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/561
dc.language.isoen_US
dc.publisherElsevier
dc.rights.holderElsevier
dc.subject.keywordAstrochemistry
dc.subject.keywordAstrophysical ices
dc.subject.keywordPROCODA
dc.subject.keywordComputational methodology
dc.titleModeling the chemical evolution and kinetics of pure H2O Ices under various types of radiation employing the PROCODA code
dc.typeArtigos de Periódicos

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