J/A+A/693/A128ivo://CDS.VizieR/J/A+A/693/A128doi:10.26093/cds/vizier.36930128CDSSmith A.M.S.Csizmadia Sz.Van Grootel V.Lendl M.Persson C.M.,Olofsson G.Ehrenreich D.Gunther M.N.Heitzmann A.Barros S.C.,Bonfanti A.Brandeker A.Cabrera J.Demangeon O.D.S.Fossati L.,Harre J.-V.Hooton M.J.Hoyer S.Kalman Sz.Salmon S.Sousa S.G.,Szabo M.Gy.Wilson T.G.Alibert Y.Alonso R.Asquier J.Barczy T.,Barrado D.Baumjohann W.Benz W.Billot N.Borsato L.Broeg C.,Collier Cameron A.Correia A.C.M.Cubillos P.E.Davies M.B.Deleuil M.,Deline A.Demory B.-O.Derekas A.Edwards B.Egger J.A.Erikson A.,Fortier A.Fridlund M.Gandolfi D.Gazeas K.Gillon M.Gudel M.,Hasiba J.Helling C.Isaak K.G.Kiss L.Korth J.Lam K.W.F.,Laskar J.Lecavelier des Etangs A.Magrin D.Maxted P.F.L.Merin B.,Mordasini C.Nascimbeni V.Ottensamer R.Pagano I.Palle E.Peter G.,Piazza D.Piotto G.Pollacco D.Queloz D.Ragazzoni R.Rando N.,Rauer H.Ribas I.Santos N.C.Scandariato G.Segransan D.Simon A.E.,Stalport M.Sulis S.Udry S.Ulmer-Moll S.Venturini J.Villaver E.,Viotto V.Walter I.Walton N.A.Wolf S.2025-03-03T20:01:08Z2025-01-13T08:19:46ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyWe aim to observe the transits and occultations of WASP-33b, which orbits a rapidly-rotating {delta} Scuti pulsator, with the goal of measuring the orbital obliquity via the gravity-darkening effect, and constraining the geometric albedo via the occultation depth. We observed four transits and four occultations with CHEOPS, and employ a variety of techniques to remove the effects of the stellar pulsations from the light curves, as well as the usual CHEOPS systematic effects. We also performed a comprehensive analysis of low-resolution spectral and Gaia data to re-determine the stellar properties of WASP-33. We measure an orbital obliquity 111.3^+0.2^_-0.7_ degrees, which is consistent with previous measurements made via Doppler tomography. We also measure the planetary impact parameter, and confirm that this parameter is undergoing rapid secular evolution as a result of nodal precession of the planetary orbit. This precession allows us to determine the second-order fluid Love number of the star, which we find agrees well with the predictions of theoretical stellar models. We are unable to robustly measure a unique value of the occultation depth, and emphasise the need for long-baseline observations to better measure the pulsation periods.2025A&A...693A.128Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/693/A128CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/526/L10 : Transits of WASP-33 (Herrero+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/693/A128https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/693/A128http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/693/A128https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/693/A128https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/693/A128http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/693/A128GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/693/A128/w33_drpRaw CHEOPS photometry from DRP reductionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian Date (TDB) (BJD-2450000.0)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxUncertainty on the fluxstat.error;phot.fluxdoubleRollSpacecraft roll angledeginstr.offsetdoubleVisitVisit no. (see Table 3)meta.idintJ/A+A/693/A128/w33_pipeRaw CHEOPS photometry from PIPE reductionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian Date (TDB) (BJD-2450000.0)dtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxUncertainty on the fluxstat.error;phot.fluxdoubleVisitVisit no. (see Table 3)meta.idintJ/A+A/693/A128/detrendDetrended DRP transit photometryFluxRelative fluxphot.flux;arith.ratiodoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian Date (TDB) (BJD-2450000.0)dtime.epochdoublee_FluxUncertainty on the fluxstat.error;phot.fluxdoubleVisitVisit no. (see Table 3)meta.idint