J/ApJ/834/207ivo://CDS.VizieR/J/ApJ/834/207doi:10.26093/cds/vizier.18340207CDSMehrabi A.He H.Khosroshahi H.2017-09-04T08:45:12Z2017-08-18T12:05:23ZCDS support team

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

cds-question@unistra.frg-starsphotometrymagnetic-fieldsstellar-massesstellar-radiiThe variation of a stellar light curve owing to rotational modulation by magnetic features (starspots and faculae) on the star's surface can be used to investigate the magnetic properties of the host star. In this paper, we use the periodicity and magnitude of the light-curve variation as two proxies to study the stellar magnetic properties for a large sample of G-type main sequence Kepler targets, for which the rotation periods were recently determined. By analyzing the correlation between the two magnetic proxies, it is found that: (1) the two proxies are positively correlated for most of the stars in our sample, and the percentages of negative, zero, and positive correlations are 4.27%, 6.81%, and 88.91%, respectively; (2) negative correlation stars cannot have a large magnitude of light-curve variation; and (3) with the increase of rotation period, the relative number of positive correlation stars decreases and the negative correlation one increases. These results indicate that stars with shorter rotation period tend to have positive correlation between the two proxies, and a good portion of the positive correlation stars have a larger magnitude of light-curve variation (and hence more intense magnetic activities) than negative correlation stars.2017ApJ...834..207Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/834/207CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)J/AJ/130/873 : Properties of BQS objects in the SDSS DR3 area (Jester+, 2005)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/A+A/529/A89 : Kepler satellite variability study (Debosscher+, 2011)J/AJ/141/50 : White-light flares on cool stars from Kepler (Walkowicz+, 2011)J/ApJS/199/30 : Effective temperature scale for KIC stars (Pinsonneault+, 2012)J/other/Nat/485.478 : Superflares on solar-type stars (Maehara+, 2012)J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)J/A+A/557/L10 : Rotation periods of 12000 Kepler stars (Nielsen+, 2013)J/A+A/560/A4 : Rotation periods of active Kepler stars (Reinhold+, 2013)J/ApJS/209/5 : Superflares of Kepler stars. I. (Shibayama+, 2013)J/ApJ/781/124 : Granulation model for 508 KIC stars (Cranmer+, 2014)J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)J/MNRAS/447/2714 : Flare stars across the H-R diagram (Balona+, 2015)J/ApJ/829/23 : Stellar flares from Q0-Q17 Kepler LCs (Davenport, 2016)J/ApJS/229/30 : Revised properties of Q1-17 Kepler targets (Mathur+, 2017)http://archive.stsci.edu/kepler/ : MAST Kepler accesshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/834/207https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/834/207http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/834/207https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/834/207https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/834/207http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/834/207GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/834/207/table1 (The correlation, mean values of i_AC_, mean value of R_eff_, period, mass, radius, and effective temperature of the Kepler stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/834/207/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/834/207/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/834/207/table1?GETtext/xml+votable180.050000true291.1397136.622780.0055555555555555564/933 935 944 945 5/3646 3683 3689 3690 3691 3692 3693 3694 3729 3730 3731 3739 3760 3784 3792 6/14567 14573 14575 14577 14578 14579 14580 14582 14588 14590 14591 14731 14744 14746 14749 14750 14751 14780 14782 14792 14794 14795 14816 14817 14818 14826 14827 14830 14831 14914 14915 14949 14954 14955 15044 15045 15057 15059 15060 15061 15062 15140 15141 15142 15144 15146 15152 15153 15155 15156 15157 15158 15161 15172 15173 15174 15178 15232https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/834/207?format=asciiOpticaldefaultJ/ApJ/834/207/table1The correlation, mean values of i_AC_, mean value of R_eff_, period, mass, radius, and effective temperature of the Kepler starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICUnique Kepler IDmeta.idintCorCorrelation between two magnetic proxiesstat.correlationdoubleiAC[0.05/0.5] Mean value of degree of periodicity; see equation 2 (i_AC_)meta.notedoubleReff[/0.3] Mean value of fluctuation amplitude; see equation 4 (R_eff_)src.sample;stat.meandoublePer[4.5/30] The rotation period (1)dtime.periodfloatMass[0.8/1.3] The mass of star (1)solMassphys.massfloatRad[0.6/3.4] The radius of star (2)solRadphys.size.radiusfloatTeff[5310/6680] The effective surface temperature (2)Kphys.temperature.effectiveintKCatDisplay data from McQuillan+, 2014, J/ApJS/211/24; Huber+, 2014, J/ApJS/211/2 and Mathur+, 2017, J/ApJS/229/30meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions of KIC stars from KIC catalog (V/133) (right ascension part)degpos.eq.ra;meta.main_DEPositions of KIC stars from KIC catalog (V/133) (declination part)degpos.eq.dec;meta.main