J/ApJ/961/85ivo://CDS.VizieR/J/ApJ/961/85CDSIsaacson H.Kane S.R.Carter B.Howard A.W.Weiss L.Petigura E.A.,Fulton B.2026-05-22T11:44:31Z2026-05-22T12:40:14ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyspectroscopySurveys of exoplanet host stars are valuable tools for assessing population level trends in exoplanets, and their outputs can include stellar ages, activity, and rotation periods. We extracted chromospheric activity measurements from the California-Kepler Survey Gaia survey spectra in order to probe connections between stellar activity and fundamental stellar properties. Building on the California Kepler Survey's legacy of 1189 planet host star stellar properties including temperature, surface gravity metallicity, and isochronal age, we add measurements of the CaII H and K lines as a proxy for chromospheric activity for 879 planet hosting stars. We used these chromospheric activity measurements to derive stellar rotation periods. We find a discrepancy between photometrically derived and activity-derived rotation periods for stars on the Rossby Ridge. These results support the theory of weakened magnetic braking. We find no evidence for metallicity-dependent activity relations, within the metallicity range of -0.2 to +0.3 dex. With our single epoch spectra we identify stars that are potentially in Maunder minimum-like state using a combination of log(R_HK_^'^) and position below the main sequence. We do not yet have the multiyear time series needed to verify stars in Maunder minimum-like states. These results can help inform future theoretical studies that explore the relationship between stellar activity, stellar rotation, and magnetic dynamos.2024ApJ...961...85Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/961/85CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/159 : Ca II H and K Measurements Made at MWO (Duncan+ 1991)J/AJ/111/439 : Chromospheric emission in late-type stars. (Henry+ 1996)J/ApJS/152/261 : Chromospheric Ca II emission in nearby stars (Wright+, 2004)J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)J/ApJ/728/117 : Kepler planetary candidates. I. (Borucki+, 2011)J/ApJ/736/19 : Kepler planetary candidates. II. (Borucki+, 2011)J/PASP/124/1279 : Q3 Kepler's combined photometry (Christiansen+, 2012)J/ApJS/204/24 : Kepler planetary candidates. III. (Batalha+, 2013)J/MNRAS/436/1883 : Properties of KOI host stars (Walkowicz+, 2013)J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)J/ApJ/784/45 : Kepler's multiple planet candidates. III. (Rowe+, 2014)J/ApJ/787/47 : 106 Kepler ultra-short-period planets (Sanchis-Ojeda+, 2014)J/ApJ/801/3 : Rotation periods for Q3-Q14 KOIs (Mazeh+, 2015)J/ApJ/805/175 : Keck and APF radial velocities of HD7924 (Fulton+, 2015)J/AJ/154/107 : California-Kepler Survey (CKS). I. (Petigura+, 2017)J/AJ/154/108 : California-Kepler Survey (CKS). II. (Johnson+, 2017)J/AJ/154/109 : California-Kepler Survey (CKS). III. Radii (Fulton+, 2017)J/MNRAS/474/2094 : Inferring probabilistic stellar rot. periods (Angus+, 2018)J/AJ/155/48 : California-Kepler Survey (CKS). V. Masses (Weiss+, 2018)J/AJ/155/89 : California-Kepler Survey (CKS). IV. (Petigura+, 2018)J/AJ/156/264 : California-Kepler Survey. VII. Radius gap (Fulton+, 2018)J/ApJS/235/38 : Kepler planet cand. VIII. DR25 reliability (Thompson+, 2018)J/AJ/158/109 : Occurrence rates of planets orbiting FGK stars (Hsu+, 2019)J/AJ/159/280 : Gaia-Kepler stellar properties cat. I. KIC (Berger+, 2020)J/AJ/160/108 : Gaia-Kepler stellar properties cat. II. (Berger+, 2020)J/ApJ/904/140 : Rup147 members & rot. data for 5 other cl. (Curtis+, 2020)J/ApJS/247/9 : FGK stars magnetic activity (Zhang+, 2020)J/AJ/161/265 : Compared rot. periods for 1189 CKS host stars (David+, 2021)J/A+A/646/A77 : Activity from AMBRE-HARPS (Gomes da Silva+, 2021)J/other/NatAs/5.707 : Dwarf stars asteroseismic rotation rates (Hall+, 2021)J/AJ/162/61 : RVel follow up of Barnard's star with HPF (Lubin+, 2021)J/ApJS/255/17 : Kepler stars surface rot. & activity. II. (Santos+, 2021)J/ApJ/930/7 : Rot. distrib. from TESS-APOGEE-Kepler-Gaia (Avallone+, 2022)J/AJ/163/183 : S-value for Sun-like stars with HIRES and HKP (Baum+, 2022)J/ApJ/936/L23 : T4 APT photometry of HD 166620 (Luhn+, 2022)J/AJ/163/179 : The California-Kepler Survey. X. (Petigura+, 2022)J/ApJS/261/26 : Exoplanet host stars from LAMOST-TESS-Kepler-K2 (Su+, 2022)J/AJ/166/62 : New HIRES radial velocity data for V1298 Tau (Blunt+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/961/85https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/961/85http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/961/85https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/961/85https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/961/85http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/961/85GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/961/85/table2 (Activity metrics and derived values)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/961/85/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/961/85/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/961/85/table2?GETtext/xml+votable180.050000true286.8084949.31641420.0055555555555555564/922-923 933-935 945 5/3645-3647 3683 3704 3706 3729-3731 3776-3778 3785-3789 3792 6/14567 14573 14575 14578-14579 14730-14731 14738 14744 14746 14750-14751 14792 14794-14795 14828 14830 14914-14915 15040-15041 15043-15044 15057 15059-15062 15116 15118-15119 15136-15137 15139 15160 15172-15174 15176 15178 15200 15232https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/961/85?format=asciiOpticaldefaultJ/ApJ/961/85/table2Activity metrics and derived valuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKOIName of the star from Fulton+ 2018, J/AJ/156/264meta.id;meta.maincharSvalue[0.07/0.9] HIRES S-value measurement (see Section 2.1)phot.flux;arith.ratiofloatlogRHK[-6.4/-4.2]? log(R'_HK_) valuephot.flux;arith.ratiofloatnullableS/N[1.4/67.6] Signal-to-noise ratio per pixelstat.snr;instr.pixelfloatProt[0/72.62] Rotation period, activitydtime.periodfloatlogAge[6.37/11.3] Log of agelog(yr)time.agefloatQual[0/1] Quality (1 = ok)meta.code.qualfloatf_QualFlag on Qualmeta.codecharProtph[1.5/45.7]? Photometric rotation perioddtime.periodfloatnullableq_Protph[0/3] Quality flag on Prot (1)meta.code.qualintSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main