J/MNRAS/515/3212ivo://CDS.VizieR/J/MNRAS/515/3212doi:10.26093/cds/vizier.75153212CDSSouthworth J.Barker A.J.Hinse T.C.Jongen Y.Dominik M.,Jorgensen U.G.Longa-Pena P.Sajadian S.Snodgrass C.Tregloan-Reed J.,Bach-moller N.Bonavita M.Bozza V.Burgdorf M.J.Figuera Jaimes R.,Helling C.Hitchcock J.A.Hundertmark M.Khalouei E.Korhonen H.,Mancini L.Peixinho N.Rahvar S.Rabus M.Skottfelt J.Spyratos P.2024-08-22T20:16:06Z2022-11-24T08:32:25ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsinfrared-photometryvisible-astronomyultraviolet-astronomyHATS-18 b is a transiting planet with a large mass and a short orbital period, and is one of the best candidates for the detection of orbital decay induced by tidal effects. We present extensive photometry of HATS-18 from which we measure 27 times of mid-transit. Two further transit times were measured from data from the Transiting Exoplanet Survey Satellite (TESS) and three more taken from the literature. The transit timings were fitted with linear and quadratic ephemerides and an upper limit on orbital decay was determined. This corresponds to a lower limit on the modified stellar tidal quality factor of Q*'>10^(5.11+/-0.04)^. This is at the cusp of constraining the presence of enhanced tidal dissipation due to internal gravity waves. We also refine the measured physical properties of the HATS-18 system, place upper limits on the masses of third bodies, and compare the relative performance of TESS and the 1.54m Danish Telescope in measuring transit times for this system.2022MNRAS.515.3212Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/515/3212CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)J/A+A/527/A8 : Transiting planetary system WASP-7 (Southworth+, 2011)J/MNRAS/420/2580 : Four transits of HAT-P-13 (Southworth+, 2012)J/MNRAS/422/3099 : Transits of HAT-P-5 (Southworth+, 2012)J/MNRAS/426/1338 : Transiting planetary system WASP-17 (Southworth+, 2012)J/MNRAS/434/1300 : Planetary systems WASP-15, WASP-16 (Southworth+, 2013)J/MNRAS/444/776 : WASP-24, WASP-25 and WASP-26 (Southworth+, 2014)J/MNRAS/447/711 : Transiting planetary system WASP-103 (Southworth+, 2015)J/MNRAS/454/3094 : Transiting planetary system WASP-57 (Southworth+, 2016)J/MNRAS/457/4205 : WASP-22, WASP-41, WASP-42 and WASP-55 (Southworth+, 2016)J/AJ/153/191 : Transiting planetary system GJ 1132 (Southworth+, 2017)J/MNRAS/490/4230 : Transiting planet WASP-4b (Southworth+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/515/3212https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/515/3212http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/515/3212https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/515/3212https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/515/3212http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/515/3212GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVOpticalInfrareddefaultJ/MNRAS/515/3212/hats18daDifferential photometry of HATS-18 from the Danish telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date for the midpoint of observation (TDB)dtime.epochdoublemagDifferential I-band magnitudemagphot.mag;arith.diffdoublee_magMeasurement error of the differential magnitudemagstat.error;phot.magdoubleJ/MNRAS/515/3212/hats18joDifferential photometry of HATS-18 from the Jongen telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date for the midpoint of observation (TDB)dtime.epochdoublemagDifferential UV/IR-band magnitudemagphot.mag;arith.difffloate_magMeasurement error of the differential magnitudemagstat.error;phot.magfloat