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hal.structure.identifierIndian Institute of Astrophysics [IIA]
dc.contributor.authorDAS, Ankan,
hal.structure.identifierIndian Institute of Astrophysics [IIA]
dc.contributor.authorSAHU, Dipen,
hal.structure.identifierAMOR 2015
dc.contributor.authorMAJUMDAR, Liton
hal.structure.identifierIndian Institute of Astrophysics [IIA]
dc.contributor.authorCHAKRABARTI, Sandip K.,
dc.date.issued2015
dc.identifier.issn0035-8711
dc.description.abstractEnWe carry out Monte-Carlo simulation to study deuterium enrichment of interstellar grain mantles under various physical conditions. Based on the physical properties, various types of clouds are considered. We find that in diffuse cloud regions, very strong radiation fields persists and hardly a few layers of surface species are formed. In translucent cloud regions with a moderate radiation field, significant number of layers would be produced and surface coverage is mainly dominated by photo-dissociation products such as, C,CH_3,CH_2D,OH and OD. In the intermediate dense cloud regions (having number density of total hydrogen nuclei in all forms ~ 2 x 10^4 cm^-3), water and methanol along with their deuterated derivatives are efficiently formed. For much higher density regions (~ 10^6 cm^-3), water and methanol productions are suppressed but surface coverage of CO,CO_2,O_2,O_3 are dramatically increased. We find a very high degree of fractionation of water and methanol. Observational results support a high fractionation of methanol but surprisingly water fractionation is found to be low. This is in contradiction with our model results indicating alternative routes for de-fractionation of water. Effects of various types of energy barriers are also studied. Moreover, we allow grain mantles to interact with various charged particles (such as H^+, Fe^+,S^+ and C^+) to study the stopping power and projected range of these charged particles on various target ices.
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enAstrophysics - Astrophysics of Galaxies
dc.subject.enAstrophysics - Cosmology and Nongalactic Astrophysics
dc.title.enDeuterium enrichment of the interstellar grain mantle
dc.typeArticle de revue
dc.identifier.doi10.1093/mnras/stv2264
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.identifier.arxiv1510.00117
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page540-551
bordeaux.volume455
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-01212875
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01212875v1
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