Review of OCS gas-phase reactions in dark cloud chemical models
| hal.structure.identifier | Institut des Sciences Moléculaires [ISM] | |
| dc.contributor.author | LOISON, Jean-Christophe | |
| dc.contributor.author | HALVICK, Philippe | |
| hal.structure.identifier | Laboratoire de Physico-Chimie Moléculaire [LPCM] | |
| hal.structure.identifier | Dipartimento di Chimica | |
| dc.contributor.author | BERGEAT, Astrid | |
| hal.structure.identifier | Institut des Sciences Moléculaires [ISM] | |
| dc.contributor.author | HICKSON, Kevin M. | |
| hal.structure.identifier | AMOR 2012 | |
| dc.contributor.author | WAKELAM, Valentine | |
| dc.date.created | 2012-01-20 | |
| dc.date.issued | 2012 | |
| dc.identifier.issn | 0035-8711 | |
| dc.description.abstractEn | The association reaction S + CO {\to} OCS + hnu has been identified as being particularly important for the prediction of gas-phase OCS abundances by chemical models of dark clouds. We performed detailed ab-initio calculations for this process in addition to undertaking an extensive review of the neutral-neutral reactions involving this species which might be important in such environments. The rate constant for this association reaction was estimated to be several orders of magnitude smaller than the one present in current astrochemical databases. The new rate for this reaction and the introduction of other processes, notably OH + CS {\to} OCS + H and C + OCS {\to} CO + CS, dramatically changes the OCS gas-phase abundance predicted by chemical models for dark clouds. The disagreement with observations in TMC-1 (CP) and L134N (N), suggests that OCS may be formed on grain surfaces as is the case for methanol. The observation of solid OCS on interstellar ices supports this hypothesis. | |
| dc.language.iso | en | |
| dc.publisher | Oxford University Press (OUP): Policy P - Oxford Open Option A | |
| dc.subject.en | Astrophysics | |
| dc.subject.en | Galaxy Astrophysics | |
| dc.subject.en | Physics | |
| dc.subject.en | Chemical Physics | |
| dc.title.en | Review of OCS gas-phase reactions in dark cloud chemical models | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1111/j.1365-2966.2012.20412.x | |
| dc.subject.hal | Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO] | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO] | |
| dc.identifier.arxiv | 1201.4256 | |
| bordeaux.journal | Monthly Notices of the Royal Astronomical Society | |
| bordeaux.page | 1476-1484 | |
| bordeaux.volume | 421 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00665009 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00665009v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly%20Notices%20of%20the%20Royal%20Astronomical%20Society&rft.date=2012&rft.volume=421&rft.issue=2&rft.spage=1476-1484&rft.epage=1476-1484&rft.eissn=0035-8711&rft.issn=0035-8711&rft.au=LOISON,%20Jean-Christophe&HALVICK,%20Philippe&BERGEAT,%20Astrid&HICKSON,%20Kevin%20M.&WAKELAM,%20Valentine&rft.genre=article |
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