J/A+A/686/A84ivo://CDS.VizieR/J/A+A/686/A84doi:10.26093/cds/vizier.36860084CDSLeonardi P.Nascimbeni V.Granata V.Malavolta L.Borsato L.,Biazzo K.Lanza A.F.Desidera S.Piotto G.Nardiello D.Damasso M.,Cunial A.Bedin L.R.2024-11-21T20:01:44Z2024-05-31T09:44:35ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyThe discovery of the first transiting hot Jupiters (HJs), giant planets on orbital periods shorter than P~10 days, was announced more than 20 years ago. As both ground- and space-based follow-up observations are piling up, we are approaching the temporal baseline required to detect secular variations in their orbital parameters. In particular, several recent studies have focused on constraining the efficiency of the tidal decay mechanism to better understand the evolutionary timescales of HJ migration and engulfment. This can be achieved by measuring a monotonic decrease in orbital period dP/dt<0 due to mechanical energy being dissipated by tidal friction. WASP-12b was the first HJ for which a tidal decay scenario appeared convincing, even though alternative explanations have been hypothesized. Here we present a new analysis based on 28 unpublished high-precision transit light curves gathered over a 12-year baseline and combined with all the available archival data, and an updated set of stellar parameters from HARPS-N high-resolution spectra, which are consistent with a main-sequence scenario, close to the hydrogen exhaustion in the core. Our values of dP/dt=-30.72+/-2.67 and Q'_*_=(2.13+/-0.18)*10^5^ are statistically consistent with previous studies, and indicate that WASP-12 is undergoing fast tidal dissipation. We additionally report the presence of excess scatter in the timing data and discuss its possible origin.2024A&A...686A..84Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/686/A84CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/720/872 : A spectropolarimetric analysis of WASP-12 (Fossati+, 2010)J/A+A/528/A65 : WASP-12b transits (Maciejewski+, 2011)J/A+A/551/A108 : Multi-site obs. of WASP-12 b transit (Maciejewski+, 2013)J/A+A/588/L6 : WASP-12 transit light curves (Maciejewski+ 2016)J/A+A/628/A115 : WASP-12, CoRoT-1 and TrES-3 light curves (von Essen+, 2019)J/AJ/161/72 : 180 Transit and occultation times for WASP-12bJ/AJ/163/175 : WASP-12 individual transit fit with TESS (Wong+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/686/A84https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/686/A84http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/686/A84https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/686/A84https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/686/A84http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/686/A84GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/686/A84/t0-litTransit times of WASP-12b (TASTE + Literature)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpochEpoch numbermeta.id;meta.mainintBJDBarycentric Julian date (TDB) of mid-observationdtime.epochdoublee_BJD1 sigma uncertainty in BJDdstat.errordoubleSourceSources from literature (1)meta.bibcharJ/A+A/686/A84/lc-allLight curve of WASP-12brecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Day (TDB)dtime.epochdoubleindexedFluxNormalized Fluxphot.flux;arith.ratiodoublee_FluxError on Fluxstat.error;phot.fluxdoubleJ/A+A/686/A84/t0-tasteTASTE Central Transit times of WASP-12brecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpochEpoch numbermeta.id;meta.mainintBJDBarycentric Julian date (TDB) of mid-observationdtime.epochdoublee_BJD1 sigma uncertainty in BJDdstat.errordouble