J/AJ/158/197ivo://CDS.VizieR/J/AJ/158/197doi:10.26093/cds/vizier.51580197CDSRodriguez J.E.Eastman J.D.Zhou G.Quinn S.N.Beatty T.G.Penev K.,Johnson M.C.Cargile P.A.Latham D.W.Bieryla A.Collins K.A.,Dressing C.D.Ciardi D.R.Relles H.M.Murawski G.Nishiumi T.,Yonehara A.Ishimaru R.Yoshida F.Gregorio J.Lund M.B.Stevens D.J.,Stassun K.G.Gaudi B.S.Colon K.D.Pepper J.Narita N.Awiphan S.,Chuanraksasat P.Benni P.Zambelli R.Garrison L.H.Wilson M.L.,Cornachione M.A.Wang S.X.Labadie-Bartz J.Rodriguez R.Siverd R.J.,Yao X.Bayliss D.Berlind P.Calkins M.L.Christiansen J.L.,Cohen D.H.Conti D.M.Curtis I.A.Depoy D.L.Esquerdo G.A.Evans P.,Feliz D.Fulton B.J.Holoien T.W.-S.James D.J.Jayasinghe T.,Jang-Condell H.Jensen E.L.N.Johnson J.A.Joner M.D.Khakpash S.,Kielkopf J.F.Kuhn R.B.Manner M.Marshall J.L.McLeod K.K.,McCrady N.Oberst T.E.Oelkers R.J.Penny M.T.Reed P.A.Sliski D.H.,Shappee B.J.Stephens D.C.Stockdale C.Tan T.-G.Trueblood M.,Trueblood P.Villanueva S.Wittenmyer R.A.Wright J.T.2020-03-02T12:37:13Z2020-01-20T14:31:18ZCDS support team

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

cds-question@unistra.frf-starsradial-velocityphotometryexoplanetsWe present the discovery of KELT-24 b, a massive hot Jupiter orbiting a bright (V=8.3 mag, K=7.2 mag) young F-star with a period of 5.6 days. The host star, KELT-24 (HD 93148), has a T_eff_=6509_-49_^+50^ K, a mass of M_*_=1.460_-0.059_^+0.055^ M_{sun}_, a radius of R_*_=1.506+/-0.022 R_{sun}_, and an age of 0.78_-0.42_^+0.61^ Gyr. Its planetary companion (KELT-24 b) has a radius of R_P_=1.272+/-0.021 R_J_ and a mass of M_P_=5.18_-0.22_^+0.21^ M_J_, and from Doppler tomographic observations, we find that the planet's orbit is well-aligned to its host star's projected spin axis ({lambda}=2.6_-3.6_^+5.1^). The young age estimated for KELT-24 suggests that it only recently started to evolve from the zero-age main sequence. KELT-24 is the brightest star known to host a transiting giant planet with a period between 5 and 10 days. Although the circularization timescale is much longer than the age of the system, we do not detect a large eccentricity or significant misalignment that is expected from dynamical migration. The brightness of its host star and its moderate surface gravity make KELT-24b an intriguing target for detailed atmospheric characterization through spectroscopic emission measurements since it would bridge the current literature results that have primarily focused on lower mass hot Jupiters and a few brown dwarfs.2019AJ....158..197Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/197CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/720/1118 : i-band photometry of HAT-P-16 (Buchhave+, 2010)J/ApJ/756/L33 : Radial velocities of 2 hot Jupiters in Praesepe (Quinn+, 2012)J/AJ/156/234 : KELT transit false positive catalog for TESS (Collins+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/197https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/197http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/197https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/158/197https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/158/197http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/158/197GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/AJ/158/197/fig1The KELT discovery light curve of KELT-24recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Date; Terrestrial Time (TT)dtime.epochdoubleNFlux[0.974322/1.01895] Normalized fluxphot.flux;arith.ratiofloate_NFlux[0.0013549/0.00558809] Uncertainty in NFluxstat.errorfloatJ/AJ/158/197/fig2The KELT-FUN light curves of KELT-24 brecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs[1/9] Observation code (1)meta.codeintBJDBarycentric Julian Date; TDBdtime.epochdoubleNFlux[0.973309/2.95666] Normalized fluxphot.flux;arith.ratiodoublee_NFlux[0.000309/0.007222] Uncertainty in NFluxstat.errorfloatAir[1.0482/2.0964]? Airmassobs.airMassfloatnullableJ/AJ/158/197/table3Relative out of transit radial velocities for KELT-24 from TRESrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date; TDBdtime.epochdoubleRV[-29/914] Radial velocitym/sphys.veloc;pos.heliocentricinte_RV[20/58] Uncertainty in RVm/sstat.errorintBis[-199.2/197.2] Bisector spanm/sphys.velocfloate_Bis[42.4/116] Uncertainty in Bism/sstat.errorfloat