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hal.structure.identifierAMOR 2014
dc.contributor.authorREBOUSSIN, Laura
hal.structure.identifierAMOR 2014
dc.contributor.authorWAKELAM, Valentine
hal.structure.identifierAMOR 2014
dc.contributor.authorGUILLOTEAU, S.
hal.structure.identifierFORMATION STELLAIRE 2014
dc.contributor.authorHERSANT, F.
dc.date.created2014-03-20
dc.date.issued2014
dc.identifier.issn0035-8711
dc.description.abstractEnGrain-surface reactions play an essential role in interstellar chemistry, since dust grain catalyses reactions at its surface allowing for the formation of molecules. We used a chemical model in which both gas-phase and grain-surface reactions occur and studied particularly the diffusion mechanisms on the surface of the grains. Surface reactions can occur via thermal hopping when species cross over a potential barrier or via quantum tunneling when species cross through this barrier. We show that the thermal diffusion (hopping) can be much more efficient after a cosmic ray particle collides with a dust grain, heating it to a peak temperature of 70K. We present here the results of numerical simulations after including the quantum tunneling mechanism for species H, H2 and O and considering the effect of cosmic ray particle collision on the surface reactions. As a consequence, the gas-phase and grain-surface abundances are affected and we show that more complex molecules can be formed in molecular clouds.
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.title.enGrain Surface Reactions in Molecular Clouds: The Effect of Cosmic Rays and Quantum Tunneling
dc.typeArticle de revue
dc.identifier.doi10.1093/mnras/stu462
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.identifier.arxiv1403.5189
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page3557-3567
bordeaux.volume440
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-00964074
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00964074v1
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