J/ApJ/795/167ivo://CDS.VizieR/J/ApJ/795/167doi:10.26093/cds/vizier.17950167CDSSchmitt J.R.Agol E.Deck K.M.Rogers L.A.Gazak J.Z.Fischer D.A.,Wang J.Holman M.J.Jek K.J.Margossian C.Omohundro M.R.Winarski T.,Brewer J.M.Giguere M.J.Lintott C.Lynn S.Parrish M.Schawinski K.,Schwamb M.E.Simpson R.Smith A.M.2017-07-19T06:45:23Z2017-06-02T14:18:14ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsWe report the discovery of one newly confirmed planet (P=66.06 days, R_P_=2.68+/-0.17 R_{Earth}_) and mass determinations of two previously validated Kepler planets, Kepler-289 b (P=34.55 days, R_P_=2.15+/-0.10 R_{Earth}_) and Kepler-289-c (P=125.85 days, R_P_=11.59+/-0.10 R_{Earth}_), through their transit timing variations (TTVs). We also exclude the possibility that these three planets reside in a 1:2:4 Laplace resonance. The outer planet has very deep (~1.3%), high signal-to-noise transits, which puts extremely tight constraints on its host star's stellar properties via Kepler's Third Law. The star PH3 is a young (~1 Gyr as determined by isochrones and gyrochronology), Sun-like star with M_*_=1.08+/-0.02 M_{sun}_, R_*_=1.00+/-0.02 R_{sun}_, and T_eff_=5990+/-38 K. The middle planet's large TTV amplitude (~5 hr) resulted either in non-detections or inaccurate detections in previous searches. A strong chopping signal, a shorter period sinusoid in the TTVs, allows us to break the mass-eccentricity degeneracy and uniquely determine the masses of the inner, middle, and outer planets to be M=7.3+/-6.8 M_{oplus}_, 4.0+/-0.9M_{oplus}_, and M=132+/-17 M_{oplus}_, which we designate PH3 b, c, and d, respectively. Furthermore, the middle planet, PH3 c, has a relatively low density, {rho}=1.2+/-0.3 g/cm3 for a planet of its mass, requiring a substantial H/He atmosphere of 2.1_-0.3_^+0.8^% by mass, and joins a growing population of low-mass, low-density planets.2014ApJ...795..167Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/795/167CatalogResearchIsServedByTAP VizieR generic servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)J/ApJS/197/2 : Transit timing observations from Kepler. I. (Ford+, 2011)J/ApJ/768/127 : Q1-11 Kepler light curve of KIC 4862625 (Schwamb+, 2013)J/ApJS/217/16 : Kepler planetary candidates. V. 3yr Q1-Q12 (Rowe+, 2015)J/ApJS/217/18 : Potential transit signals in Kepler Q1-Q17 (Seader+, 2015)J/ApJ/812/46 : Transit metric for Q1-Q17 Kepler candidates (Thompson+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/795/167https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/795/167http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/795/167https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/795/167https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/795/167http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/795/167GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/795/167/table4Transits of PH3 b, c, and d through January, 2019recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanet[bcd] Planet identifiermeta.id;meta.maincharTransit[0/100] Transit numbermeta.numberintJDJulian date of midtransit (JD-2454000)dtime.epochdoublee_JDError in JDdstat.error;time.epochfloatObs[Obs. ] Transit observed?meta.codechar