J/A+A/575/L15ivo://CDS.VizieR/J/A+A/575/L15doi:10.26093/cds/vizier.35759015CDSSozzetti A.Bonomo A.S.Biazzo K.Mancini L.Damasso M.Desidera S.,Gratton R.Lanza A.F.Poretti E.Rainer M.Malavolta L.Affer L.,Barbieri M.Bedin L.R.Boccato C.Bonavita M.Borsa F.Ciceri S.,Claudi R.U.Gandolfi D.Giacobbe P.Henning T.Knapic C.Latham D.W.,Lodato G.Maggio A.Maldonado J.Marzari F.Martinez Fiorenzano A.F.,Micela G.Molinari E.Mordasini C.Nascimbeni V.Pagano I.Pedani M.,Pepe F.Piotto G.Santos N.Scandariato G.Shkolnik E.Southworth J.2017-06-13T11:09:23Z2015-06-16T08:01:14ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsphotometryradial-velocityWe update the TrES-4 system parameters using high-precision HARPS-N radial-velocity measurements and new photometric light curves. A combined spectroscopic and photometric analysis allows us to determine a spectroscopic orbit with a semi-amplitude K=51+/-3m/s. The derived mass of TrES-4b is found to be M_p_=0.49+/-0.04M_Jup_, significantly lower than previously reported. Combined with the large radius (R_p_=1.84_-0.09_^+0.08^R_Jup_) inferred from our analysis, TrES-4b becomes the transiting hot Jupiter with the second-lowest density known. We discuss several scenarios to explain the puzzling discrepancy in the mass of TrES-4b in the context of the exotic class of highly inflated transiting giant planets.2015A&A...575L..15Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/575/L15CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/554/A28 : Qatar-1 differential light curve (Covino+, 2013)J/A+A/575/A111 : GAPS. V: Global analysis of the XO-2 system (Damasso+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/575/L15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/575/L15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/575/L15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/575/L15https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/575/L15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/575/L15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/575/L15/table3Differential photometry of TrES-4 (Ic band, CAHA 1.23-m)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB) (BJD-2450000)dtime.epochdoubleRflux[0.9875/1.0021] Relative Ic fluxphot.flux.density;em.opt.Rdoublee_Rflux[[0.0007/0.0009] rms uncertainty on magstat.errordoubleJ/A+A/575/L15/table1HARPS-N systemic radial velocities, formal errors, bisector spans, and chromospheric activity index of TrES-4recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric JD for the midpoint of observation (TDB) (BJD-2450000)dtime.epochdoublegammaSystemic radial velocity {gamma}km/sphys.veloc;pos.heliocentricfloate_gammarms uncertainty on gammakm/sstat.errorfloatBSBisector Spankm/sphys.velocfloatlogR'HK[-5.4/-5.0] Chromospheric activity indexphot.flux;arith.ratiofloat