J/ApJ/692/L9ivo://CDS.VizieR/J/ApJ/692/L9doi:10.26093/cds/vizier.16929009CDSLevrard B.Winisdoerffer C.Chabrier G.2018-01-08T06:38:11Z2011-03-14T12:07:08ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frsolar-system-planetsstellar-evolutionary-modelsstellar-massesmultiple-starsWe revisit the tidal stability of extrasolar systems harboring a transiting planet and demonstrate that, independently of any tidal model, none, but one (HAT-P-2b) of these planets has a tidal equilibrium state, which implies ultimately a collision of these objects with their host star. Consequently, conventional circularization and synchronization timescales cannot be defined because the corresponding states do not represent the endpoint of the tidal evolution. Using numerical simulations of the coupled tidal equations for the spin and orbital parameters of each transiting planetary system, we confirm these predictions and show that the orbital eccentricity and the stellar obliquity do not follow the usually assumed exponential relaxation but instead decrease significantly, eventually reaching a zero value only during the final runaway merging of the planet with the star. The only characteristic evolution timescale of all rotational and orbital parameters is the lifetime of the system, which crucially depends on the magnitude of tidal dissipation within the star. These results imply that the nearly circular orbits of transiting planets and the alignment between the stellar spin axis and the planetary orbit are unlikely to be due to tidal dissipation. Other dissipative mechanisms, for instance interactions with the protoplanetary disk, must be invoked to explain these properties.2009ApJ...692L...9Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/692/L9CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/510/A107 : TrES-2b multi-band transit observations (Mislis+, 2010)J/MNRAS/408/1494 : Planetary transits of TrES-2 and TrES-3 (Colon+, 2010)J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)J/A+A/500/L45 : Observations of transits of the TrES-2 exoplanet (Mislis+,J/A+A/508/1011 : Planetary transit of TrES-1 and TrES-2 (Rabus+, 2009)J/A+A/503/601 : HD 17156 transit photometry + radial velocities (Barbieri+,J/AJ/136/267 : Six occultations of the exoplanet TrES-3 (Winn+, 2008)J/ApJ/675/1531 : Transits of super-Neptune HD 149026b (Winn+, 2008)J/A+A/475/1125 : Characterization of the hot Neptune GJ 436b (Demory+, 2007)J/ApJ/657/1098 : Transit of TrES-1 (Winn+, 2007)J/ApJ/664/1185 : Three transits of the exoplanet TrES-2 (Holman+, 2007)J/AJ/133/1828 : Transit light curves of HD 189733 (Winn+, 2007)J/ApJ/655/1103 : Five transits of the exoplanet OGLE-TR-10b (Holman+, 2007)J/A+A/466/743 : Transiting planet OGLE-TR-132b (Gillon+, 2007)J/ApJ/649/1043 : Transiting extrasolar planet HD 209458b (Richardson+, 2006)J/A+A/424/L31 : Transiting exoplanet OGLE-TR-132b (Moutou+, 2004)J/ApJ/582/1123 : Search for transiting extrasolar planets (Mallen-Ornelas+,J/A+A/392/215 : The CORALIE survey for extrasolar planets. IX. (Santos+,https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/692/L9https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/692/L9http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/692/L9https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/692/L9https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/692/L9http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/692/L9GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/692/L9/table1 (Values and uncertainties of parameters relevant to tidal evolution of transiting planetary systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/692/L9/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/692/L9/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/692/L9/table1?GETtext/xml+votable180.050000true42.435364471.75323220.0055555555555555566/3876 9173 9355 9459 9811 10730 12424 12644 12983 13680 13702 14886 14914 15143 20339 28548 28821 28822 32727 32749 37246 37247 37923https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/692/L9?format=asciiOpticaldefaultJ/ApJ/692/L9/table1Values and uncertainties of parameters relevant to tidal evolution of transiting planetary systemsl_vsiniLimit flag on vsinimeta.code.error;phys.veloc.rotatcharMpPlanetary mass in Jupiter masses(1.898187x10+27kg)phys.massfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNamePlanetary system namemeta.id;pos.framechare_MpUncertainty in Mp(1.898187x10+27kg)stat.errorfloatr_MpSource(s) of Mp and e_Mp (1)meta.ref;pos.framecharRpPlanetary radius in Jupiter radiiphys.size.radiusfloatRpMinLower limit value in Rpphys.size.radiusfloatRpMaxUpper limit value in Rpphys.size.radiusfloatr_RpSource(s) of Rp and Limit value in Rp (1)meta.ref;pos.framecharTorbOrbital perioddtime.perioddoubler_TorbSource(s) of Torb (1)meta.ref;pos.framecharaSeparationAUpos.distance;src.orbitaldoublee_aUncertainty in aAUstat.errordoubler_aSource(s) of a and e_a (1)meta.bibcharMstarStellar masssolMassphys.massfloate_MstarUncertainty in MstarsolMassstat.errorfloatr_MstarSource(s) of Mstar and e_Mstar (1)meta.ref;pos.framecharRstarStellar radiussolRadphys.size.radiusfloate_RstarUncertainty in RstarsolRadstat.errorfloatr_RstarSource(s) of Rstar and e_Rstar (1)meta.ref;pos.framecharvsiniProjected stellar rotation velocity (2)km/sphys.veloc.rotatfloate_vsini? Uncertainty in vsinikm/sstat.error;phys.veloc.rotatfloatnullabler_vsiniSource(s) of vsini and e_vsini (1)meta.refchare? Orbital eccentricitysrc.orbital.eccentricityfloatnullablee_e? Uncertainty in estat.errorfloatnullabler_eSource of e and e_e (1)meta.ref;pos.framecharExoSimbad column added by the CDSmeta.ref.urlcharSimbadSimbad column added by the CDSchar_RAPositions from Simbad (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad (declination part)degpos.eq.dec;meta.main