J/ApJ/771/107ivo://CDS.VizieR/J/ApJ/771/107doi:10.26093/cds/vizier.17710107CDSEverett M.E.Howell S.B.Silva D.R.Szkody P.2017-12-22T05:32:11Z2015-02-18T08:33:45ZCDS support team

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

cds-question@unistra.frsolar-system-planetsmultiple-starsstellar-radiimetallicityStellar properties are measured for a large set of Kepler mission exoplanet candidate host stars. Most of these stars are fainter than 14th magnitude, in contrast to other spectroscopic follow-up studies. This sample includes many high-priority Earth-sized candidate planets. A set of model spectra are fitted to R~3000 optical spectra of 268 stars to improve estimates of T_eff_, log(g), and [Fe/H] for the dwarfs in the range 4750<=T_eff_<=7200K. These stellar properties are used to find new stellar radii and, in turn, new radius estimates for the candidate planets. The result of improved stellar characteristics is a more accurate representation of this Kepler exoplanet sample and identification of promising candidates for more detailed study. This stellar sample, particularly among stars with T_eff_>~5200K, includes a greater number of relatively evolved stars with larger radii than assumed by the mission on the basis of multi-color broadband photometry. About 26% of the modeled stars require radii to be revised upward by a factor of 1.35 or greater, and modeling of 87% of the stars suggest some increase in radius. The sample presented here also exhibits a change in the incidence of planets larger than 3-4R_{Earth}_ as a function of metallicity. Once [Fe/H] increases to >=-0.05, large planets suddenly appear in the sample while smaller planets are found orbiting stars with a wider range of metallicity.2013ApJ...771..107Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/771/107CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)VI/120 : High-resolution synthetic stellar library (Coelho+, 2005)J/ApJS/213/5 : Cool KOIs. VI. H- and K- band spectra (Muirhead+, 2014)J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)J/ApJS/210/20 : Small Kepler planets radial velocities (Marcy+, 2014)J/ApJS/210/19 : Kepler planetary candidates. IV. 22 months (Burke+, 2014)J/ApJS/210/1 : Asteroseismic study of solar-type stars (Chaplin+, 2014)J/ApJ/770/69 : Kepler planet candidates radii (Petigura+, 2013)J/ApJ/770/43 : Spectroscopic [Fe/H] of Kepler planet hosts (Mann+, 2013)J/ApJ/767/95 : Improved stellar param. of KIC stars (Dressing+, 2013)J/ApJ/750/L37 : Stellar parameters of low-mass KOIs (Muirhead+, 2012)J/ApJS/199/30 : Effective temperature for KIC stars (Pinsonneault+, 2012)J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)J/MNRAS/423/122 : Abundances of 93 solar-type Kepler targets (Bruntt+, 2012)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/ApJ/738/170 : False positive Kepler planet candidates (Morton+, 2011)J/ApJ/704/1107 : Transiting planets in HATNet field 205 (Latham+, 2009)J/AJ/133/2464 : Parameters and abundances of nearby giants (Luck+, 2007)J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)http://exoplanetarchive.ipac.caltech.edu/ : NASA exoplanet archivehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/771/107https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/771/107http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/771/107https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/771/107https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/771/107http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/771/107GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/771/107/table3 (Data used in Figures 8-10 for the planet candidates of 215 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/771/107/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/771/107/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/771/107/table3?GETtext/xml+votable180.050000true287.69842.33871810.005555555555555556Cone search capability for table J/ApJ/771/107/table2 (Stellar properties determined for 352 KOIs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/771/107/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/771/107/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/771/107/table2?GETtext/xml+votable180.050000true286.9711946.86835890.0055555555555555565/3645 3646 3689 3691 3693 3694 3695 3704 3732 3733 3735 3741 3777 3780 3782 3784 3785 3792 6/14567 14578 14579 14591 14733 14734 14735 14744 14746 14750 14751 14754 14755 14761 14762 14763 14768 14770 14771 14794 14824 14825 14827 14828 14918 14919 14920 14921 14923 14924 14925 14926 14936 14938 14939 14946 14947 14948 14950 14951 14954 14957 14958 14959 14960 14961 14968 14969 14972 14973 15040 15044 15057 15060 15104 15105 15107 15112 15113 15114 15116 15118 15119 15124 15126 15132 15135 15145 15146 15147 15148 15153 15154 15155 15156 15157 15159 15161 15172 15174 15175https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/771/107?format=asciidefaultJ/ApJ/771/107/table3Data used in Figures 8-10 for the planet candidates of 215 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKOIPlanet identifier (<KOI-NNNN.NN> in Simbad)meta.id;meta.mainfloatKICKepler parent star identifiermeta.id.parentintlog(Teff)[3.6/3.9] Log of the effective temperaturelog(K)phys.temperature.effectivefloatlog(g)[4/4.7] Log of the surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H][-0.3/0.3] Metallicitylog(Sun)phys.abund.ZfloatR*[0.7/2] Stellar radiussolRadphys.size.radiusfloatRatio[0.5/2.2] Ratio of revised to KSAS derived stellar radii (1)stat.fit.omcfloatRp[0.4/59] Planetary radius; Earth radii(6.3781x10+6m)phys.size.radiusfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Kepler Input Catalog (V/133) (right ascension part)degpos.eq.ra;meta.main_DEPositions from Kepler Input Catalog (V/133) (declination part)degpos.eq.dec;meta.mainJ/ApJ/771/107/table2Stellar properties determined for 352 KOIsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKOI[13/3259] Kepler Object of Interest numbermeta.id;meta.mainintKICKepler identifiermeta.idintNpNumber of planet candidates in table 3meta.numberintnullableKpmag[9.5/16.5] Observed Kepler magnitudemagphot.mag;em.optfloatTeff[4750/6606]? Effective temperature (1)Kphys.temperature.effectiveintnullablelog(g)[4/4.7]? Log of the surface gravity (2)log(cm.s**-2)phys.gravityfloatnullable[Fe/H][-0.3/0.3]? Metallicity (3)log(Sun)phys.abund.ZfloatnullableR*[0.7/2]? Stellar radius (4)solRadphys.size.radiusfloatnullablen_KOI[a-g, ] Additional note(s) on KOI (5)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Kepler Input Catalog (V/133) (right ascension part)degpos.eq.ra;meta.main_DEPositions from Kepler Input Catalog (V/133) (declination part)degpos.eq.dec;meta.main