J/A+A/551/A11ivo://CDS.VizieR/J/A+A/551/A11doi:10.26093/cds/vizier.35510011CDSMancini L.Southworth J.Ciceri S.Fortney J.J.Morley C.V.,Dittmann J.A.Tregloan-Reed J.Bruni I.Barbieri M.Evans D.F.,D'Ago G.Nikolov N.Henning T.2019-06-17T16:05:49Z2013-02-11T11:47:57ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsphotometryThe extrasolar planet HAT-P-8 b was thought to be one of the more inflated transiting hot Jupiters. Aims. By using new and existing photometric data, we computed precise estimates of the physical properties of the system. Methods. We present photometric observations comprising eleven light curves covering six transit events, obtained using five medium-class telescopes and telescope-defocussing technique. One transit was simultaneously obtained through four optical filters, and two transits were followed contemporaneously from two observatories. We modelled these and seven published datasets using the jktebop code. The physical parameters of the system were obtained from these results and from published spectroscopic measurements. In addition, we investigated the theoretically-predicted variation of the apparent planetary radius as a function of wavelength, covering the range 330-960nm. Results. We find that HAT-P-8 b has a significantly lower radius (1.321R_Jup_) and mass (1.275M_Jup_) compared to previous estimates (1.50R_Jup_ and 1.52M_Jup_ respectively). We also detect a radius variation in the optical bands that, when compared with synthetic spectra of the planet, may indicate the presence of a strong optical absorber, perhaps TiO and VO gases, near the terminator of HAT-P-8 b. Conclusions. These new results imply that HAT-P-8 b is not significantly inflated, and that its position in the planetary mass-radius diagram is congruent with those of many other transiting extrasolar planets.2013A&A...551A..11Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/551/A11CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)J/A+A/527/A8 : Transiting planetary system WASP-7 (Southworth+, 2011)J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)J/MNRAS/426/1338 : Transiting planetary system WASP-17 (Southworth+, 2012)J/MNRAS/422/3099 : Transiting planetary system HAT-P-5 (Southworth+, 2012)J/MNRAS/420/2580 : Transiting planetary system HAT-P-13 (Southworth+, 2012)J/A+A/549/A10 : Transiting planetary system GJ1214 (Harpsoe+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/551/A11https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/551/A11http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/551/A11https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/551/A11https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/551/A11http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/551/A11GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/551/A11/ca220cmuPhotometry of HAT-P-8 on 2012-08-26 (u CA 2.3m)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/ca220cmzPhotometry of HAT-P-8 on 2012-08-26 (z CA 2.3m)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/cassini1Photometry of HAT-P-8 on 2009-11-12 (r Cassini)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/cassini2Photometry of HAT-P-8 on 2011-10-05 (i Cassini)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/cassini3Photometry of HAT-P-8 on 2012-10-02 (I Cassini)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/intPhotometry of HAT-P-8 on 2010-08-28 (y INT)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/kuiperPhotometry of HAT-P-8 on 2009-10-22 (I Kuiper)magDifferential magnitude of WASP-2magphot.magdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/ca123cm1Photometry of HAT-P-8 on 2011-10-05 (R CA 1.23m)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/ca123cm2Photometry of HAT-P-8 on 2012-10-02 (I CA 1.23m)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/ca220cmgPhotometry of HAT-P-8 on 2012-08-26 (g CA 2.3m)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdoubleJ/A+A/551/A11/ca220cmrPhotometry of HAT-P-8 on 2012-08-26 (r CA 2.3m)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB, BJD-2400000)dtime.epochdoublemagDifferential magnitude of WASP-2magphot.magdoublee_magMeasurement error of magnitudemagstat.error;phot.magdouble