J/A+A/682/A102ivo://CDS.VizieR/J/A+A/682/A102doi:10.26093/cds/vizier.36820102CDSPagano I.Scandariato G.Singh V.Lendl M.Queloz D.Simon A.E.,Sousa S.G.Brandeker A.Collier Cameron A.Sulis S.Van Grootel V.,Wilson T.G.Alibert Y.Alonso R.Anglada G.Barczy T.,Barrado Navascues D.Barros S.C.C.Baumjohann W.Beck M.Beck T.,Benz W.Billot N.Bonfils X.Borsato L.Broeg C.Bruno G.Carone L.,Charnoz S.Corral van Damme C.Csizmadia Sz.Cubillos P.E.Davies M.B.,Deleuil M.Deline A.Delrez L.Demangeon O.D.S.Demory B.-O.,Ehrenreich D.Erikson A.Fortier A.Fossati L.Fridlund M.Gandolfi D.,Gillon M.Guedel M.Guenther M.N.Helling C.Hoyer S.Isaak K.G.,Kiss L.L.Kopp E.Lam K.W.F.Laskar J.Lecavelier des Etangs A.,Magrin D.Maxted P.F.L.Mordasini C.Munari M.Nascimbeni V.,Olofsson G.Ottensamer R.Palle E.Peter G.Piotto G.Pollacco D.,Ragazzoni R.Rando N.Rauer H.Reimers C.Ribas I.Rieder M.,Santos N.C.Segransan D.Smith A.M.S.Stalport M.Steller M.,Szabo Gy.M.Thomas N.Udry S.Venturini J.Walton N.A.2024-11-06T20:06:44Z2024-02-08T08:47:18ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyMultiwavelength photometry of the secondary eclipses of extrasolar planets is able to disentangle the reflected and thermally emitted light radiated from the planetary dayside. This leads to the measurement of the planetary geometric albedo A_g_, which is an indicator of the presence of clouds in the atmosphere, and the recirculation efficiency {epsilon}, which quantifies the energy transport within the atmosphere. In this work we aim to measure A_g and {epsilon} for the planet WASP-178b, a highly irradiated giant planet with an estimated equilibrium temperature of 2450K. We analyzed archival spectra and the light curves collected by CHEOPS and TESS to characterize the host WASP-178, refine the ephemeris of the system and measure the eclipse depth in the passbands of the two respective telescopes. We measured a marginally significant eclipse depth of 70+/-40ppm in the TESS passband and statistically significant depth of 70+/-20ppm in the CHEOPS passband. Combining the eclipse depth measurement in the CHEOPS (lambda_eff_=6300{AA}) and TESS (lambda_eff_=8000{AA}) passbands we constrained the dayside brightness temperature of WASP-178b in the 2250-2800K interval. The geometric albedo 0.1<A_g_<0.35 is in general agreement with the picture of poorly reflective giant planets, while the recirculation efficiency {epsilon}>0.7 makes WASP-178b an interesting laboratory to test the current heat recirculation models.2024A&A...682A.102Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/682/A102CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/682/A102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/682/A102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/682/A102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/682/A102https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/682/A102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/682/A102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/682/A102/lcCHEOPS photometric datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVisit[1/6] Running ID for the CHEOPS visits listed in Table 2 of the papermeta.idintBJDTimestamps of the light curve (TDB)dtime.epochdoubleFluxFlux extracted by PIPEphot.flux.density;em.optdoublee_FluxError on Fluxstat.error;phot.fluxdoubleFlag[0/25] Flag assigned by PIPEmeta.code.errorintFluxDet? Normalized secondary eclipse light curves after additional data clipping, normalization and red noise correction (see paper)phot.flux;arith.ratiodoublenullablee_FluxDet? Error on FluxDetstat.errordoublenullable