J/A+A/634/L9ivo://CDS.VizieR/J/A+A/634/L9doi:10.26093/cds/vizier.36349009CDSWitzke V.Reinhold T.Shapiro A.I.Krivova N.A.Solanki S.K.2021-09-06T18:48:30Z2020-06-13T10:50:58ZCDS support team

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

cds-question@unistra.frg-starschemical-abundanceseffective-temperaturephotometryvisible-astronomyThe accurate determination of stellar rotation periods is important for estimating stellar ages and for understanding stellar activity and evolution. While rotation periods can be determined for about thirty thousand stars in the Kepler field, there are over one hundred thousand stars, especially with low photometric variability and irregular pattern of variations, for which rotational periods are unknown. Here we investigate the effect of metallicity on the detectability of rotation periods. This is done by synthesising light curves of hypothetical stars that are identical to our Sun with the exception of the metallicity. These light curves are then used as an input to the period determination algorithms. We find that the success rate for recovering the rotation signal has a minimum close to the solar metallicity value. This can be explained by the compensation effect of facular and spot contributions. In addition, selecting solar-like stars with near-solar effective temperature and photometric variability, and with metallicity between M/H=-0.35 and M/H=0.35 from the Kepler sample, we analyse the fraction of stars for which rotational periods have been detected as a function of metallicity. In agreement with our theoretical estimate we find a local minimum for the detection fraction close to the solar metallicity. We further report rotation periods of 87 solar-like Kepler stars for the first time.2020A&A...634L...9Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/634/L9CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/634/L9https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/634/L9http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/634/L9https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/634/L9https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/634/L9http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/634/L9GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/634/L9/tablea1 (Stellar fundamental parameters and rotation periods of the 97 periodic stars in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/634/L9/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/634/L9/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/634/L9/tablea1?GETtext/xml+votable180.050000true282.623291744.07805560.0055555555555555565/3785 6/5833 14589 14734 14744 14756-14757 14760 14763-14766 14770-14771 14774 14781 14824-14825 14827 14920 14924 14927-14929 14931-14934 14936 14941 14948-14949 14956 14959-14960 14962 14964 14968 14971-14973 14975 15040 15060 15105 15109 15112-15113 15115 15117 15119-15122 15124 15126-15127 15129 15137 15148 15156 15159 15168 15172https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/634/L9?format=asciiOpticaldefaultJ/A+A/634/L9/tablea1Stellar fundamental parameters and rotation periods of the 97 periodic stars in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNote[N] N for New periodsmeta.notecharKICKIC numbermeta.id;meta.mainintTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloat[M/H]Metallicityphys.abund.ZfloatProtRotational velocitydphys.veloc.rotatfloatRvarVariability range%src.var.amplitudefloatKpmagApparent Kepler magnitudemagphot.mag;em.optfloatGMAGAbsolute Gaia magnitudemagphys.magAbsfloat_RAPositions from Simbad ans KIC (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad ans KIC (declination part)degpos.eq.dec;meta.main