J/MNRAS/336/879ivo://CDS.VizieR/J/MNRAS/336/879doi:10.26093/cds/vizier.73360879CDSKotoneva E.Flynn C.Chiappini C.Matteucci F.2024-06-28T20:16:54Z2003-06-29T09:29:06ZCDS support team

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

cds-question@unistra.frk-starsdwarf-starsinfrared-photometryvisible-astronomybroad-band-photometrykron-cousins-photometrymedium-band-photometryK dwarfs have lifetimes older than the present age of the Galactic disc, and are thus ideal stars for investigating the chemical evolution of the disc. We have developed several photometric metallicity indicators for K dwarfs, based on a sample of accurate spectroscopic metallicities for 34 disc and halo G and K dwarfs. The photometric metallicities lead us to develop a metallicity index for K dwarfs based only on their position in the colour-absolute-magnitude diagram. Metallicities have been determined for 431 single K dwarfs drawn from the Hipparcos catalogue, selecting the stars by absolute magnitude and removing multiple systems. The sample is essentially a complete reckoning of the metal content in nearby K dwarfs. We use stellar isochrones to mark the stars by mass, and select a subset of 220 of the stars, which is complete within a narrow mass interval. We fit the data with a model of the chemical evolution of the solar cylinder. We find that only a modest cosmic scatter is required to fit our age-metallicity relation. The model assumes two main infall episodes for the formation of the halo-thick disc and thin disc, respectively. The new data confirm that the solar neighbourhood formed on a long time-scale of the order of 7Gyr.2002MNRAS.336..879Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/336/879CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/129/237 : G and K dwarfs abundances (Feltzing+ 1998)J/AJ/105/1962 : K and M dwarfs photometry (Weis, 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/336/879https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/336/879http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/336/879https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/336/879https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/336/879http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/336/879GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/336/879/table3 (Data set)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/336/879/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/336/879/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/336/879/table3?GETtext/xml+votable180.050000true0.113126-79.0619830.0055555555555555566/49 60 100 237 610 713 814 819 1098 1320 1530 1645 1873 2149 2622 2711 3199 3217 3372 3509 3786 3915-3916 3979 4147 4591 4642 4766 4867 4990 5095 5167 5191 5212 5309 5434 5496 5791 5824 5914 5970 6050 6130 6226 6287 6371 6385 6501 6953 7029 7132 7163 7219-7220 7285 7419 7443 7508 7525 7582 7637 7721 7866 7874 7895 7982 8156-8157 8224 8239 8249 8254 8357 8424 8479 8591 8627 8699 8887 8893 8910 9024 9074 9093 9182 9202 9354 9602 9668 9772 9801 9888 10062 10238 10325 10408 10469 10501 10518 10548 10634 10914 11103 11126 11145 11165 11276 11340 11348 11405 11412 11569 11633 11713 11732 11806 11933 12092 12388 12467 12654 12658 12846 12916 12983 13025 13036 13126 13487 13541 13568 13698 13763 13769 14007 14290 14426 14463 14512 14999 15056 15227 15712 16059 16134 16164 16342 16347 16393 16451 16455 16502 16518 16543 16590 16603 16622 16689 16693 16890 16955 17107 17314 17507 17552 17566 17607 17664 17671 17714 17731 17768 17993 18011 18115 18147 18299 18398 18471 18641 18747 18780 18792 18839 19002 19051 19140 19153 19219 19488 19649 19796 19836 20233 20237 20298 20377 20397 20402 20557 20640 20873 21703 21772 21838 21953 22408 22475 22818 23159 23233 23484 23739 23774 24036 24099 24117 24713 24729 24777 24816 24831 25099 25224 25512 25591 25678 25703 25795 25939 25980 26060 26134 26183 26313 26357 26403 26420 26429 26468 26480 26651 26761 26788 26796 26906 26972 26997 27090 27102 27299 27314 27374 27385 27443 27462 27478 27592 27696 27825 27895 27949 28062 28072 28098 28123 28244-28245 28268 28395 28400 28428 28432 28496 28500 28510 28529 28571 28579 28664 29084 29756 30176 30343 30645 31130 31277 31399 31411 31425 31516 32211 32318 32399 32482 32509 32520 32596 32757 32834 32936 32998 33091 33179 33418 33499 33572 33598 33631 33705 33774 33813 33818 33965 33998 34045 34073 34208 34282 34408 34508 34515 34573 34581 34673 34754 34821 34947 34953 35017 35079 35228 35268 35501 35668 35691 35707 35727 35753 35773 35790 35831 35896 36008 36015 36089 36195 36288-36289 36315 36350 36365 36418 36564 36577 36590 36664 36735 36800 36808 37479 37516 37865 37955 38219 38728 38765 38975 38998 39040 39284 39527 39735 40078 40404 41140 41460 41463 41612 41687 41969 42022 42426 42595 43065 43696 43714 43804 43928 44262 44652 44792 44879 45112 45309 45334 45511 45527 45564 45589 45717 45823 45853 45902 45941 46103 46135 46215 46250 46271 46363 46391 46403 46484 46488 46501 46664 46785 46873 46925 46933 46956 46997 47020 47198 47258 47824 47949 48652 48705 48958https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/336/879?format=asciiOpticalInfrareddefaultJ/MNRAS/336/879/table3Data setrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIP (Cat. <I/239>) numbermeta.id;meta.mainintHD? HD (Cat. <III/135>) numbermeta.idintnullableVmagVisual magnitudemagphot.mag;em.opt.VfloatVMAGAbsolute V magnitude, as computed from the Hipparcos parallaxmagphys.magAbs;em.optfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatRc-Ic? Cousins R-I colour indexmagphot.color;em.opt.R;em.opt.Idoublenullablem1? Stroemgren m1 colour indexmagphot.colordoublenullablec1? Stroemgren c1 colour indexmagphot.colordoublenullableb1? Geneva b1 colour indexmagphot.colordoublenullable[Fe/H]m1? Stroemgren-based metallicitylog(Sun)phys.abund.Fedoublenullable[Fe/H]b1? Geneva-based metallicitylog(Sun)phys.abund.Fedoublenullable[Fe/H]KFLuminosity-based metallicitylog(Sun)phys.abund.FefloatUvel? U space velocitykm/sphys.velocdoublenullableVvel? V space velocitykm/sphys.velocdoublenullableWvel? W space velocitykm/sphys.velocdoublenullableSimbadSimbad column added by the CDSmeta.refchar_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