J/A+A/636/A98ivo://CDS.VizieR/J/A+A/636/A98doi:10.26093/cds/vizier.36360098CDSCortes-Zuleta P.Rojo P.Wang S.Hinse T.C.Hoyer S.Sanhueza B.,Correa-Amaro P.Albornoz J.2020-07-23T13:36:07Z2020-04-24T07:35:40ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryWe present 22 new transit observations of the exoplanets WASP-18Ab, WASP-19b, and WASP-77Ab, from the Transit Monitoring in the South (TraMoS) project. We simultaneously model our newly collected transit light curves with archival photometry and radial velocity data to obtain refined physical and orbital parameters. We include TESS light curves of the three exoplanets to perform an extended analysis of the variations in their transit mid-time (TTV) and to refine their planetary orbital ephemeris. We did not find significant TTVRMS variations larger than 47, 65, and 86 seconds for WASP-18Ab, WASP-19b, and WASP-77Ab, respectively. Dynamical simulations were carried out to constrain the masses of a possible perturber. The observed mean square (RMS) could be produced by a perturber body with an upper limit mass of 9, 2.5, 11 and 4M_{Earth}_ in 1:2, 1:3, 2:1, and 3:1 resonances in the WASP-18Ab system. In the case of WASP-19b, companions with masses up to 0.26, 0.65, 1, and 2.8M_{Earth}_, in 1:2, 2:1, 3:1, and 5:3 resonances respectively, produce the RMS. For the WASP-77Ab system, this RMS could be produced by a planet with mass in the range of 1.5-9M_{Earth}_ in 1:2, 1:3, 2:1, 2:3, 3:1, 3:5, or 5:3 resonances. Comparing our results with RV variations, we discard massive companions with 350M_{Earth}_ in 17:5 resonance for WASP-18Ab, 95M_{Earth}_ in 4:1 resonance for WASP-19b, and 105M_{Earth}_ in 5:2 resonance for WASP-77Ab. Finally, using a Lomb-Scargle period search we find no evidence of a periodic trend on our TTV data for the three exoplanets.2020A&A...636A..98Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/636/A98CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)J/MNRAS/436/2 : Transits of WASP-19b (Mancini+, 2013)J/MNRAS/428/3671 : Transiting planet WASP-19b (Tregloan-Reed+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/636/A98https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/636/A98http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/636/A98https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/636/A98https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/636/A98http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/636/A98GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/636/A98/stars (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/636/A98/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/636/A98/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/636/A98/stars?GETtext/xml+votable180.050000true24.3542917-45.67788890.0055555555555555566/35210 36794 38452https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/636/A98?format=asciidefaultJ/A+A/636/A98/starsList of studied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetName of the starmeta.id;meta.maincharRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainNobsNumber of observations in table2.datmeta.numberintLCShow the light curvesmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/636/A98/table2Photometry light curves from the TraMoS project of WASP-18A, WASP-19, and WASP-77AFluxRelative fluxphot.flux;arith.ratiodoublee_FluxError of the relative fluxstat.error;phot.fluxdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetName of the starmeta.id;meta.maincharBJDBarycentric Julian date in the TDB standarddtime.epochdouble