First observation of CO at 345 GHz in the atmosphere of Saturn with the JCMT. New constaints on its origin
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | CAVALIÉ, T. | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | BILLEBAUD, F. | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | DOBRIJEVIC, M. | |
| hal.structure.identifier | Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA] | |
| dc.contributor.author | FOUCHET, T. | |
| hal.structure.identifier | Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA] | |
| dc.contributor.author | LELLOUCH, E. | |
| hal.structure.identifier | Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA] | |
| dc.contributor.author | ENCRENAZ, T. | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | BRILLET, J. | |
| hal.structure.identifier | Herzberg Institute of Astrophysics | |
| dc.contributor.author | MORIARTY, P. | |
| hal.structure.identifier | Joint Astronomy Center [JAC] | |
| dc.contributor.author | WOUTERLOOT, J.P. | |
| hal.structure.identifier | Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS] | |
| dc.contributor.author | HARTOGH, P. | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0019-1035 | |
| dc.description.abstractEn | We have performed the first observation of the CO(3-2) spectral line in the atmosphere of Saturn with the James Clerk Maxwell Telescope. We have used a transport model of the atmosphere of Saturn to constrain the origin of the observed CO. The CO line is best-fit when the CO is located at pressures less than (15± 2) mbar with a mixing ratio of (2.5±0.6)×10-8 implying an external origin. By modelling the transport in Saturn's atmosphere, we find that a cometary impact origin with an impact 200-350 years ago is more likely than continuous deposition by interplanetary dust particles (IDP) or local sources (rings/satellites). This result would confirm that comet impacts are relatively frequent and efficient providers of CO to the atmospheres of the outer planets. However, a diffuse and/or local source cannot be rejected, because we did not account for photochemistry of oxygen compounds. Finally, we have derived an upper limit of 1×10-9 on the tropospheric CO mixing ratio. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | saturn | |
| dc.subject.en | atmosphere | |
| dc.subject.en | spectroscopy | |
| dc.title.en | First observation of CO at 345 GHz in the atmosphere of Saturn with the JCMT. New constaints on its origin | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.icarus.2009.05.024 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| bordeaux.journal | Icarus | |
| bordeaux.page | 531-540 | |
| bordeaux.volume | 203 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00400419 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00400419v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Icarus&rft.date=2009&rft.volume=203&rft.issue=2&rft.spage=531-540&rft.epage=531-540&rft.eissn=0019-1035&rft.issn=0019-1035&rft.au=CAVALI%C3%89,%20T.&BILLEBAUD,%20F.&DOBRIJEVIC,%20M.&FOUCHET,%20T.&LELLOUCH,%20E.&rft.genre=article |
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