J/AJ/152/187ivo://CDS.VizieR/J/AJ/152/187doi:10.26093/cds/vizier.51520187CDSMulders G.D.Pascucci I.Apai D.Frasca A.Molenda-Zakowicz J.2017-09-19T14:24:00Z2017-02-01T15:25:55ZCDS support team

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

cds-question@unistra.frsolar-system-planetsmultiple-starsmetallicityHost star metallicity provides a measure of the conditions in protoplanetary disks at the time of planet formation. Using a sample of over 20000 Kepler stars with spectroscopic metallicities from the LAMOST survey, we explore how the exoplanet population depends on host star metallicity as a function of orbital period and planet size. We find that exoplanets with orbital periods less than 10 days are preferentially found around metal-rich stars ([Fe/H]{simeq}0.15+/-0.05dex). The occurrence rates of these hot exoplanets increases to ~30% for super-solar metallicity stars from ~10% for stars with a sub-solar metallicity. Cooler exoplanets, which reside at longer orbital periods and constitute the bulk of the exoplanet population with an occurrence rate of >~90%, have host star metallicities consistent with solar. At short orbital periods, P<10days, the difference in host star metallicity is largest for hot rocky planets (<1.7R_{Earth}_), where the metallicity difference is [Fe/H]{simeq}0.25+/-0.07dex. The excess of hot rocky planets around metal-rich stars implies they either share a formation mechanism with hot Jupiters, or trace a planet trap at the protoplanetary disk inner edge, which is metallicity dependent. We do not find statistically significant evidence for a previously identified trend that small planets toward the habitable zone are preferentially found around low-metallicity stars. Refuting or confirming this trend requires a larger sample of spectroscopic metallicities.2016AJ....152..187Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/152/187CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/594/A39 : LAMOST-Kepler parameters & activity indicators (Frasca+, 2016)J/A+A/587/A64 : Physical properties of giant exoplanets (Santerne+, 2016)J/ApJS/224/12 : Kepler planetary candidates. VII. 48-month (Coughlin+, 2016)J/ApJ/814/130 : Planet occurrence rates calculated for KOIs (Mulders+, 2015)J/ApJ/810/95 : Kepler pipeline S/N studies. II. (Christiansen+, 2015)J/ApJ/808/187 : Metallicities of KIC stars without planets (Buchhave+, 2015)J/ApJS/220/19 : LAMOST obs. in the Kepler field. I. (De Cat+, 2015)J/ApJS/217/31 : Kepler planetary candidates. VI. 4yr Q1-Q16 (Mullally+, 2015)J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/152/187https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/152/187http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/152/187https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/152/187https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/152/187http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/152/187GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/152/187/table1 (Planet occurrence rates and host star metallicities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/152/187/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/152/187/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/152/187/table1?GETtext/xml+votable180.050000true286.808458349.31638890.0055555555555555564/933 5/3645 3647 3689 3691 3693 3695 3736 3738 3742 3776 3777 3778 3782 3783 3785 3786 3788 3792 6/14567 14573 14578 14579 14584 14585 14587 14731 14733 14734 14735 14744 14746 14750 14751 14752 14753 14755 14760 14761 14763 14768 14769 14770 14777 14779 14792 14816 14817 14818 14824 14825 14827 14830 14917 14918 14919 14921 14922 14923 14924 14948 14950 14951 14957 14958 14959 14960 14961 14963 14966 14967 14972 14973 14975 15040 15041 15043 15045 15057 15060 15116 15118 15119 15120 15121 15122 15124 15126 15127 15136 15137 15139 15148 15149 15150 15156 15158 15160 15161 15172 15176 15200https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/152/187?format=asciidefaultJ/AJ/152/187/table1Planet occurrence rates and host star metallicitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler identification number of the starmeta.id.parentintKOI[1.01/6246.01] Kepler Object of Interest identifiermeta.id;meta.maindoubleRpPlanet radiuscmphys.size.radiusfloatPer[0.6/581.7] Orbital perioddtime.periodfloatfocc[0/0.22] Planet occurrence rate in entire samplestat.fit.paramfloat[Fe/H][-1.67/0.71] Stellar metallicitylog(Sun)phys.abund.Zfloatfoccsub[0/0.54] Planet occurrence rate per subsample: denotes the occurence rate of the planet in the super-solar or sub-solar metallicity sample (1)stat.fit.paramfloatMull15Display KOI data from Mullally et al. 2015 (J/ApJS/217/31), if anymeta.numberintnullableC15Display KIC data from Christiansen et al. 2015 (J/ApJ/810/95), if anymeta.numberintnullableC16Number of KIC data in Coughlin et al. 2016 (J/ApJS/224/12), if anymeta.numberintnullableMuld15Display KOI data from Mulders et al. 2015 (Cat. J/ApJ/814/130)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition of KIC star from http://exoplanetarchive.ipac.caltech.edu (right ascension part)degpos.eq.ra;meta.main_DEPosition of KIC star from http://exoplanetarchive.ipac.caltech.edu (declination part)degpos.eq.dec;meta.main