J/ApJ/753/90ivo://CDS.VizieR/J/ApJ/753/90doi:10.26093/cds/vizier.17530090CDSMann A.W.Gaidos E.Lepine S.Hilton E.J.2014-03-28T16:46:35Z2014-03-14T08:53:40ZCDS support team

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

cds-question@unistra.freffective-temperaturemultiple-starslate-type-starssolar-system-planetsWe estimate the stellar parameters of late K- and early M-type Kepler target stars. We obtain medium-resolution visible spectra of 382 stars with K_P_-J>2 (=~K5 and later spectral type). We determine luminosity class by comparing the strength of gravity-sensitive indices (CaH, K I, Ca II, and Na I) to their strength in a sample of stars of known luminosity class. We find that giants constitute 96%+/-1% of the bright (K_P_<14) Kepler target stars, and 7%+/-3% of dim (K_P_>14) stars, significantly higher than fractions based on the stellar parameters quoted in the Kepler Input Catalog (KIC). The KIC effective temperatures are systematically (110^+15^_-35_K) higher than temperatures we determine from fitting our spectra to PHOENIX stellar models. Through Monte Carlo simulations of the Kepler exoplanet candidate population, we find a planet occurrence of 0.36+/-0.08 when giant stars are properly removed, somewhat higher than when a KIC log g>4 criterion is used (0.27+/-0.05). Last, we show that there is no significant difference in g-r color (a probe of metallicity) between late-type Kepler stars with transiting Earth-to-Neptune-size exoplanet candidates and dwarf stars with no detected transits. We show that a previous claimed offset between these two populations is most likely an artifact of including a large number of misidentified giants.2012ApJ...753...90Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/753/90CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)J/ApJS/210/1 : KIC asteroseismic data (Chaplin+, 2014)J/ApJS/204/24 : Kepler planetary candidates. III. (Batalha+, 2013)J/A+A/557/A70 : Evolved planet hosts - stellar parameters (Mortier+, 2013)J/A+A/551/A112 : Metallicity-giant planet correlation (Mortier+, 2013)J/ApJS/199/30 : Eff. temperature scale for KIC stars (Pinsonneault+, 2012)J/ApJ/752/72 : KIC metallicity correlation (Dodson-Robinson, 2012)J/ApJ/750/L37 : Stellar parameters of low-mass KOIs (Muirhead+, 2012)J/ApJ/749/152 : Asteroseismic analysis of 22 solar-type stars (Mathur+, 2012)J/ApJ/746/36 : RV standard deviation in the M2K survey (Gaidos+, 2012)J/ApJ/738/170 : False positive Kepler planet candidates (Morton+, 2011)J/ApJ/736/L25 : Habitability of Kepler planetary cand. (Kaltenegger+, 2011)J/ApJ/736/19 : Kepler planetary candidates. II. (Borucki+, 2011)J/ApJ/728/117 : Kepler planetary candidates. I. (Borucki+, 2011)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/A+A/514/A97 : Late-type stars HR spectra (Lopez-Santiago+ 2010)J/other/Sci/330.653 : Detected planets in the Eta-Earth Survey (Howard+, 2010)J/A+A/487/373 : Spectroscopic parameters of 451 HARPS-GTO stars (Sousa+, 2008)J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)J/A+A/415/1153 : [Fe/H] for 98 extra-solar planet-host stars (Santos+, 2004)J/A+AS/105/311 : M giants spectra and photometry (Fluks+, 1994)http://keplergo.arc.nasa.gov/ : Kepler Science Center home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/753/90https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/753/90http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/753/90https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/753/90https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/753/90http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/753/90GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/753/90/table1 (Parameters of observed Kepler targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/90/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/90/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/90/table1?GETtext/xml+votable180.050000true291.2416136.749881940.0055555555555555565/3645 3647 3683 3688 3689 3690 3692 3694 3730 3731 3732 3734 3740 3743 3778 3780 3785 3786 3792 6/14567 14573 14575 14578 14579 14584 14585 14586 14730 14731 14744 14746 14750 14751 14765 14766 14767 14772 14774 14775 14780 14781 14783 14792 14794 14795 14816 14818 14819 14824 14825 14830 14914 14915 14917 14918 14919 14933 14934 14940 14941 14942 14944 14945 14947 14948 14950 14951 14952 14953 14954 14956 14958 14965 14966 14969 14970 14971 15040 15041 15042 15044 15057 15061 15104 15106 15107 15109 15110 15111 15118 15119 15124 15126 15128 15129 15130 15132 15133 15137 15139 15148 15149 15154 15155 15156 15172 15173 15174 15176 15178https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/753/90?format=asciidefaultJ/ApJ/753/90/table1Parameters of observed Kepler targetsInstInstrument (2)meta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC identifier (Cat. V/133)meta.id;meta.mainintKpmag[6/16] Kepler magnitudemagphot.mag;em.optfloatlog(g)[0/5]? KIC log of the surface gravitylog(cm.s**-2)phys.gravityfloatnullableTe(K)[3203/5051]? KIC effective temperatureKphys.temperature.effectiveintnullableLClLuminosity classification (Dwarf or Giant)phys.luminositycharTeff[3000/5000] Our effective temperatureKphys.temperature.effectiveinte_Teff[20/140] The 1{sigma} error in TeffsKstat.error;phys.temperature.effectiveint_RAPositions from the KIC catalog (Cat. V/133) (right ascension part)degpos.eq.ra;meta.main_DEPositions from the KIC catalog (Cat. V/133) (declination part)degpos.eq.dec;meta.main