J/MNRAS/509/1447ivo://CDS.VizieR/J/MNRAS/509/1447doi:10.26093/cds/vizier.75091447CDSMancini L.Southworth J.Naponiello L.Basturk O.Barbato D.,Biagiotti F.Bruni I.Cabona L.D'ago G.Damasso M.Erdem A.,Evans D.Henning T.Ozturk O.Ricci D.Sozzetti A.Tregloan-Reed J.,Yalcinkaya S.2024-08-21T20:18:55Z2022-01-25T08:15:17ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryWe present broad-band photometry of 30 planetary transits of the ultra-hot-Jupiter KELT-16 b, using five medium-class telescopes. The transits were monitored through standard B, V, R, I filters and four were simultaneously observed from different places, for a total of 36 new light curves. We used these new photometric data and those from the TESS space telescope to review the main physical properties of the KELT-16 planetary system. Our results agree with previous measurements but are more precise. We estimated the mid-transit times for each of these transits and combined them with others from the literature to obtain 69 epochs, with a time baseline extending over more than 4yr, and searched for transit time variations. We found no evidence for a period change, suggesting a lower limit for orbital decay at 8Myr, with a lower limit on the reduced tidal quality factor of Q'*>(1.9+/-0.8)x10^5^ with 95 per cent confidence. We built up an observational, low-resolution transmission spectrum of the planet, finding evidence of the presence of optical absorbers, although with a low significance. Using TESS data, we reconstructed the phase curve finding that KELT-16 b has a phase offset of 25.25+/-14.03{deg}E, a day- and night-side brightness temperature of 3190+/-61K and 2668+/-56K, respectively. Finally, we compared the flux ratio of the planet over its star at the TESS and Spitzer wavelengths with theoretical emission spectra, finding evidence of a temperature inversion in the planet's atmosphere, the chemical composition of which is preferably oxygen-rich rather than carbon-rich.2022MNRAS.509.1447Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/509/1447CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/509/1447https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/509/1447http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/509/1447https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/509/1447https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/509/1447http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/509/1447GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/509/1447/table1Details of the transit observations presented in this workLCShow the light curvemeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTelTelescopemeta.id;instr.telcharDateDate of first observationstime.epochnullableTimeSStart time (UT)time.startnullableTimeEEnd time (UT)time.endnullableNobsNumber of observationsmeta.numberintTexp1Exposure timestime.duration;obs.exposureintTexp2? Exposure timestime.duration;obs.exposureintnullableTobs1Observation cadencestime;arith.diffintTobs2? Observation cadencestime;arith.diffintnullableFilterFiltermeta.id;instr.filtercharAirmassobs.airMasscharMoonGeocentric fractional illumination of the Moon at midnight (ut)%phys.composition.massLightRatiointRap1Aperture radius (1)pixstat.fit.paramintRap2Aperture radius (1)pixstat.fit.paramintRap3Aperture radius (1)pixstat.fit.paramintScatterrms scatter of the data versus a fitted modelmmagstat.stdevfloatSim[yes/no ] Specifies if the transit was simultaneously observed by more than one telescopemeta.codecharFileNameName of the ligth curve file in subdirectory lcmeta.id;meta.filechar