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hal.structure.identifierECLIPSE 2019
dc.contributor.authorAUCLAIR-DESROTOUR, P.
hal.structure.identifierInstitut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]
dc.contributor.authorLASKAR, Jacques
hal.structure.identifierMaintenance Myélinique et Neuropathies Périphériques [MMNP]
dc.contributor.authorMATHIS, Stéphane
dc.date.conference2016-06-27
dc.description.abstractEnAtmospheric tides can have a strong impact on the rotational dynamics of planets. They are of most importance for terrestrial planets located in the habitable zone of their host star, where their competition with solid tides is likely to drive the body towards non-synchronized rotation states of equilibrium, as observed in the case of Venus. Contrary to other planetary layers, the atmosphere is sensitive to both gravitational and thermal forcings, through a complex dynamical coupling involving the effects of Coriolis acceleration and characteristics of the atmospheric structure. These key physics are usually not taken into account in modelings used to compute the evolution of planetary systems, where tides are described with parametrised prescriptions. In this work, we present a new ab initio modeling of atmospheric tides adapting the theory of the Earth's atmospheric tides (Chapman & Lindzen 1970) to other terrestrial planets. We derive analytic expressions of the tidal torque, as a function of the tidal frequency and parameters characterizing the internal structure (e.g. the Brunt-V\"ais\"al\"a frequency, the radiative frequency, the pressure heigh scale). We show that stratification plays a key role, the tidal torque being strong in the case of convective atmospheres (i.e. with a neutral stratification) and weak in case of atmosphere convectively stable. In a second step, the model is used to determine the non-synchronized rotation states of equilibrium of Venus-like planets as functions of the physical parameters of the system. These results are detailed in Auclair-Desrotour et al. (2017a) and Auclair-Desrotour et al. (2017b).
dc.language.isoen
dc.subject.enAstrophysics - Earth and Planetary Astrophysics
dc.subject.en85-06
dc.title.enAtmospheric tides and their consequences on the rotational dynamics of terrestrial planets
dc.typeCommunication dans un congrès
dc.identifier.doi10.1051/eas/1982008
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.identifier.arxiv1709.09478
bordeaux.conference.titleEAS Publications Series Volume 82 (2019) Astro Fluid: An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements Institut d'Astrophysique de Paris, France, June 27–30, 2016 A.S. Brun, S. Mathis, C. Charbonnel and B. Dubrulle (Eds.)
bordeaux.countryFR
bordeaux.conference.cityParis
bordeaux.peerReviewedoui
hal.identifierhal-01695110
hal.version1
hal.invitednon
hal.proceedingsnon
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01695110v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=AUCLAIR-DESROTOUR,%20P.&LASKAR,%20Jacques&MATHIS,%20St%C3%A9phane&rft.genre=unknown


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