J/AJ/161/72ivo://CDS.VizieR/J/AJ/161/72doi:10.26093/cds/vizier.51610072CDSTurner J.D.Ridden-Harper A.Jayawardhana R.2021-12-08T20:08:53Z2021-04-21T07:37:08ZCDS support team

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

cds-question@unistra.frexoplanetsmultiple-starsoccultationTheory suggests that the orbits of some close-in giant planets should decay due to tidal interactions with their host stars. To date, WASP-12b is the only hot Jupiter reported to have a decaying orbit, at a rate of 29{+/-}2ms/yr. We analyzed data from NASA's Transiting Exoplanet Survey Satellite (TESS) to verify that WASP-12b's orbit is indeed changing. We find that the TESS transit and occultation data are consistent with a decaying orbit with an updated period of 1.091420090{+/-}0.000000041days and a decay rate of 32.53{+/-}1.62ms/yr. We find an orbital decay timescale of {tau}=P/|P|=2.90{+/-}0.14Myr. If the observed decay results from tidal dissipation, the modified tidal quality factor is Q_*_'=1.39{+/-}0.15x10^5^, which falls at the lower end of values derived for binary star systems and hot Jupiters. Our result highlights the power of space-based photometry for investigating the orbital evolution of short-period exoplanets.2021AJ....161...72Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/72CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/720/872 : A spectropolarimetric analysis of WASP-12 (Fossati+, 2010)J/ApJ/727/125 : Two secondary eclipses of WASP-12b with Spitzer (Campo+, 2011)J/AJ/141/179 : Transits of TrES-4b, HAT-P-3b and WASP-12b (Chan+, 2011)J/A+A/551/A108 : Multi-site obs. of WASP-12 b transit (Maciejewski+, 2013)J/ApJS/208/16 : Kepler transit timing observations. VIII. (Mazeh+, 2013)J/A+A/588/L6 : WASP-12 transit light curves (Maciejewski+ 2016)J/A+A/600/A30 : Limb-darkening for TESS satellite (Claret, 2017)J/AJ/154/4 : Times of transits and occultations of WASP-12b (Patra+, 2017)J/AcA/68/371 : WASP and KELT planet transits (Maciejewski+, 2018)J/AJ/158/190 : Main sequence hot Jupiter hosts good astrometry (Hamer+, 2019)J/A+A/628/A115 : WASP-12, CoRoT-1 and TrES-3 light curves (von Essen+, 2019)J/AJ/159/150 : Transit times of 11 hot Jupiters (Patra+, 2020)http://archive.stsci.edu/ : MAST archiveshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/72https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/72http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/72https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/72https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/72http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/72GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/AJ/161/72/table2WASP-12b transit and occultation timesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEventEvent Type (1)meta.notecharBJD[2454515/2458869] Barycentric Julian date (TDB) of mid-observation (2)dtime.epochdoublee_BJD[0.0001/0.003] 1 sigma uncertainty in BJDdstat.errordoubleEpoch[-1640/2348] Epoch numbermeta.id;meta.mainintRefReference (3)meta.ref;pos.framechar