J/ApJ/687/1264ivo://CDS.VizieR/J/ApJ/687/1264doi:10.26093/cds/vizier.16871264CDSMamajek E.E.Hillenbrand L.A.2017-09-27T10:52:16Z2010-05-18T12:46:29ZCDS support team

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

cds-question@unistra.frg-starsphotometrystellar-agesWhile the strong anticorrelation between chromospheric activity and age has led to the common use of the CaII H and K emission index (R'_HK_=L_HK_/L_bol_) as an empirical age estimator for solar-type dwarfs, existing activity-age relations produce implausible ages at both high and low activity levels. We have compiled R'_HK_, data from the literature for young stellar clusters, richly populating for the first time the young end of the activity-age relation. Combining the cluster activity data with modern cluster age estimates and analyzing the color dependence of the chromospheric activity age index, we derive an improved activity-age calibration for F7-K2 dwarfs (0.5<B-V<0.9mag). We also present a more fundamentally motivated activity-age calibration that relies on conversion of R'_HK_ values through the Rossby number to rotation periods and then makes use of improved gyrochronology relations.2008ApJ...687.1264Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/687/1264CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/687/1264https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/687/1264http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/687/1264https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/687/1264https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/687/1264http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/687/1264GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/687/1264/table5 (Members of stellar aggregates with logR'_HK_ measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/687/1264/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/687/1264/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/687/1264/table5?GETtext/xml+votable180.050000true238.7494483-23.78837780.005555555555555556Cone search capability for table J/ApJ/687/1264/table8 (Old solar-type dwarfs from Valenti et al. (2005, Cat. J/ApJS/159/141) with age uncertainties of <20%)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/687/1264/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/687/1264/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/687/1264/table8?GETtext/xml+votable180.050000true10.1069569-59.45460360.005555555555555556Cone search capability for table J/ApJ/687/1264/table13 (Activity ages for the solar-type dwarfs within 16pc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/687/1264/table13?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/687/1264/table13?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/687/1264/table13?GETtext/xml+votable180.050000true1.653267529.02150330.005555555555555556Cone search capability for table J/ApJ/687/1264/binaries (log(R'_HK_) for solar-type dwarf binaries (tables 2 and 3 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/687/1264/binaries?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/687/1264/binaries?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/687/1264/binaries?GETtext/xml+votable180.050000true2.46373338.45330560.005555555555555556Cone search capability for table J/ApJ/687/1264/table4 (Field binaries with rotation periods)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/687/1264/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/687/1264/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/687/1264/table4?GETtext/xml+votable180.050000true222.84702519.1006250.005555555555555556Cone search capability for table J/ApJ/687/1264/table12 (Activity-gyro ages for solar-type binaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/687/1264/table12?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/687/1264/table12?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/687/1264/table12?GETtext/xml+votable180.050000true2.46373338.45330560.0055555555555555565/118 6/75 309 320 322 334 336 342 348 461 462 463 483 496 548 684 765 890 917 1024 1032 1042 1058 1341 1642 1771 1774 1875 2317 2476 2870 2923 3020 3092 3094 3095 3101 3102 3136 3137 3141 3383 3622 3639 4225 4298 5009 5230 5304 5406 5522 5670 7763 8614 8788 8790 8843 9403 9476 9801 9835 10225 10345 10375 10899 11290 11633 12704 13025 13301 14419 14522 14539 15154 15174 16069 16678 16903 17137 17425 17486 17576 17588 18139 18688 19554 19912 20145 20278 20328 20753 21060 21066 21177 21386 21484 22708 23096 23190 23230 23342 23454 23479 23497 23503 23511 23513 23518 23527 23529 23537 23538 23539 23542 23544 23545 23548 23774 24099 24104 24151 24194 24209 24212 24633 24713 24924 25407 26328 26379 26975 28244 28605 28664 28696 28987 29084 29196 30529 30859 30878 30965 31328 31399 31433 31478 31720 31751 32609 32619 32757 32860 33042 33116 33338 33552 33930 34446 34817 34825 34864 34896 35064 35079 35351 35497 36365 36664 36697 37408 38238 38433 38966 39500 39576 39709 39730 40078 40692 41143 41272 41295 41460 41463 41568 41763 41941 42022 42042 42248 42285 42479 42656 42683 42700 42739 42760 42890 42990 43004 43017 43804 44059 44069 44297 44299 44316 44317 44356 44388 44816 44891 45382 45669 45865 45927 45941 46247 46640 46681 47287 47377 47589 48652 48705https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/687/1264?format=asciiOpticaldefaultJ/ApJ/687/1264/table5Members of stellar aggregates with logR'_HK_ measurementsSimbadNameSimbad column added by the CDSmeta.idcharNameNamemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameSimbad Namemeta.idcharONameHD namemeta.idcharB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullabler_B-V? Reference for B-V, in refs.dat filemeta.ref;phot.color;em.opt.BintnullableE(B-V)Interstellar reddeningmagphot.color.excessfloatr_E(B-V)Reference for E(B-V), in refs.dat filemeta.ref;pos.framechar(B-V)0Intrinsic B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatr_(B-V)0Reference for (B-V)0, in refs.dat filemeta.ref;pos.framecharlogR'HKR'HK indexphot.flux;arith.ratiofloato_logR'HK? Number of measurementsmeta.numberintnullabler_logR'HKReference for logR'HK, in refs.dat filemeta.ref;pos.frameintGroupGroup name (1)meta.idchar_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.mainJ/ApJ/687/1264/table8Old solar-type dwarfs from Valenti et al. (2005, Cat. J/ApJS/159/141) with age uncertainties of <20%recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD number (Cat. III/135)meta.id;meta.mainintB-VB-V color from Perryman et al. (HIP, 1997, Cat. I/239)magphot.color;em.opt.B;em.opt.VfloattauIsochronal age (1)Gyrtime.agefloatlogR'HKR'_HK_ Chromospheric activityphot.flux;arith.ratiofloatr_logR'HKReference for logR'HK, in refs.dat filemeta.ref;pos.frameintDVMAGDifference between stellar absolute magnitude and that for an MS star of the same B-V colormagphys.magAbs;em.opt.BfloatSimbadSimbad 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.mainJ/ApJ/687/1264/table13Activity ages for the solar-type dwarfs within 16pcrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD number (Cat. III/135)meta.id;meta.mainintHIPHIP number (Cat. I/311)meta.idintGJNearby Star Catalog designation (Cat. V/70)meta.idcharONameOther namemeta.idcharplxParallaxmaspos.parallax.trigfloate_plxrms uncertainty on plxmasstat.error;pos.parallaxfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatr_B-VReference for B-V, in refs.dat filemeta.ref;phot.color;em.opt.BintlogR'HKR'_HK_ indexphot.flux;arith.ratiofloatr_logR'HKReference for logR'HK, in refs.dat filemeta.ref;pos.frameintVmagV magnitudemagphot.mag;em.opt.VfloatVMAGAbsolute V magnitudemagphys.magAbs;em.opt.VfloatDVMAGDifference between stellar absolute magnitude and that for an MS star of the same B-V colormagphys.magAbs;em.opt.BfloatSpTypeMK spectral typesrc.spTypecharr_SpTypeReference for SpType, in refs.dat filemeta.ref;pos.frameintl_tau1Limit flag on tau1meta.code.errorchartau1Age from using the revised activity-age relationGyrtime.agefloatl_tau2Limit flag on tau2meta.code.errorchartau2Age inferred from converting the chromospheric activity levels to a rotation period via the Rossby number and then converting the rotation period to an age using the revised gyro relationGyrtime.agefloatSimbadSimbad 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.mainJ/ApJ/687/1264/refsReferences and notesComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.noteintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharJ/ApJ/687/1264/binarieslog(R'_HK_) for solar-type dwarf binaries (tables 2 and 3 of paper)Sim.BName understandable by Simbadmeta.idcharSim.AName understandable by Simbadmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintbinmeta.notecharStarAName of primarymeta.id;meta.maincharStarBName of secondarymeta.id.assoccharB-V.AB-V colour index for A componentmagphot.color;em.opt.B;em.opt.VfloatB-V.BB-V colour index for B componentmagphot.color;em.opt.B;em.opt.VfloatlogR'HKAR'HK index for A componentphot.flux;arith.ratiofloatlogR'HKBR'HK index for B componentphot.flux;arith.ratiofloatRefReferences, in refs.dat file (the '*' indicates values converted to logR'_HK_ by the author following Noyes et al. (1984ApJ...279..763N))meta.bibchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/ApJ/687/1264/table4Field binaries with rotation periodsSim.BName understandable by Simbadmeta.idcharSim.AName understandable by Simbadmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarAName of primarymeta.id;meta.maincharStarBName of secondarymeta.id.assoccharB-V.AB-V colour index for A component (1)magphot.color;em.opt.B;em.opt.VfloatB-V.BB-V colour index for B componentmagphot.color;em.opt.B;em.opt.VfloatPer.APeriod of A componentdtime.periodfloatPer.BPeriod of B componentdtime.periodfloatRefReferences, in refs.dat filemeta.bibchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/ApJ/687/1264/table12Activity-gyro ages for solar-type binariesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_StarA[a] Note for HD 137763 (1)meta.notecharStarAName of primarymeta.id;meta.maincharStarBName of secondarymeta.id.assoccharlogtAActivity-gyro age for component Alog(yr)time.agefloatlogtBActivity-gyro age for component Blog(yr)time.agefloatlogtMean gyro age for the systemlog(yr)time.age;stat.meanfloate_logtrms uncertainty on logtlog(yr)stat.errorfloat_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