Grain Surface Reactions in Molecular Clouds: The Effect of Cosmic Rays and Quantum Tunneling
| hal.structure.identifier | AMOR 2014 | |
| dc.contributor.author | REBOUSSIN, Laura | |
| hal.structure.identifier | AMOR 2014 | |
| dc.contributor.author | WAKELAM, Valentine | |
| hal.structure.identifier | AMOR 2014 | |
| dc.contributor.author | GUILLOTEAU, S. | |
| hal.structure.identifier | FORMATION STELLAIRE 2014 | |
| dc.contributor.author | HERSANT, F. | |
| dc.date.created | 2014-03-20 | |
| dc.date.issued | 2014 | |
| dc.identifier.issn | 0035-8711 | |
| dc.description.abstractEn | Grain-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.iso | en | |
| dc.publisher | Oxford University Press (OUP): Policy P - Oxford Open Option A | |
| dc.title.en | Grain Surface Reactions in Molecular Clouds: The Effect of Cosmic Rays and Quantum Tunneling | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1093/mnras/stu462 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
| 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 | 1403.5189 | |
| bordeaux.journal | Monthly Notices of the Royal Astronomical Society | |
| bordeaux.page | 3557-3567 | |
| bordeaux.volume | 440 | |
| bordeaux.issue | 4 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00964074 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00964074v1 | |
| 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=2014&rft.volume=440&rft.issue=4&rft.spage=3557-3567&rft.epage=3557-3567&rft.eissn=0035-8711&rft.issn=0035-8711&rft.au=REBOUSSIN,%20Laura&WAKELAM,%20Valentine&GUILLOTEAU,%20S.&HERSANT,%20F.&rft.genre=article |
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