J/A+A/427/933ivo://CDS.VizieR/J/A+A/427/933doi:10.26093/cds/vizier.34270933CDSKovtyukh V.V.Soubiran C.Belik S.I.2017-12-15T10:55:35Z2006-05-03T20:29:50ZCDS support team

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

cds-question@unistra.frdwarf-starseffective-temperatureabsolute-magnitudeHighly precise temperatures (sigma=10-15K) have been determined from line depth ratios for a set of 248 F-K field dwarfs of about solar metallicity (-0.5<[Fe/H]<+0.4), based on high resolution (R=42000), high S/N echelle spectra. A new gap has been discovered in the distribution of stars on the Main Sequence in the temperature range 5560 to 5610K. This gap coincides with a jump in the microturbulent velocity Vt and the well-known Li depression near 5600K in field dwarfs and open clusters. As the principal cause of the observed discontinuities in stellar properties we propose the penetration of the convective zone into the inner layers of stars slightly less massive than the Sun and related to it, a change in the temperature gradient.2004A&A...427..933Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/427/933CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/218 : ELODIE archive (Prugniel+, 2001)J/A+AS/133/221 : Library of ELODIE spectra (F5-K7 stars) (Soubiran+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/427/933https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/427/933http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/427/933https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/427/933https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/427/933http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/427/933GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/427/933/table1 (Program stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/427/933/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/427/933/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/427/933/table1?GETtext/xml+votable180.050000true5.001702238.22739690.0055555555555555566/49 60 100 309 311 455 684 719 742 819 918 934 987 1028 1247 1330 1341 1530 1603 1728 1827 2110 2167 2169 2366 2472 2476 2491 2622 2697 3020 3102 3363 3372 3509 3639 3691 3697 3809 3979 4118 4128-4129 4136 4225 4735 4867 4928 4993 5009 5266 5304 5488 5496 5498 5522 5670 5726 5929 5932 6025 6052 6217 6273 6339 6385 6398 6409 6523 6890 6926 6953 7052 7354 7763 8094 8591 8663 8814 8887 9072 9357 9403 9476 9492 9662 9679 9801 9843 9873 10375 10812 10899 11142 11150 11412 11633 11644 11713 11806 11834 11862 12337 12792 12846 12856 12890 13164 13487 13547 13749 13763 13778 13791 14131 14252 14278 14290 14342 14358 14426 14539 14548 15030 15044 15174 15373 15722 15727 16031 16069 16883 17219 17425 17768 18184 18615 19051 19056 19132 19181 19830 19923 20145 20402 21177 21484 21726 21838 21858 21864 21869 22040 22122 22157 22340 22354-22355 22419 22654 22818 22868 23190 23201 23230 23284 23342 23515 23545 23575 23583 23600 23661 23774 23818 23938 24016 24019 24102 24130 24151 24178 24239 24536 24558 25567 25766 25906 25939 25966 26379 26468 26521 26975 27088 27124 27254 27374 27712 27750 27757 28282 28396 28605 29675 29784 29905 30049 30078 30123 30127 30166 30378 30407 30419 30444 30540 30576 30658 30878 30965 31073 31101 31130 31172 31204 31393 31399 31433 31478 31751 31768 31796 31813 31920 32035 32561 32757 36664 36697 40932 44284 49114https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/427/933?format=asciiOpticaldefaultJ/A+A/427/933/table1Program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_Teffrms uncertainty on TeffKstat.error;phys.temperature.effectivefloatNNumber of calibrations usedmeta.numberintloggSurface gravitylog(cm.s**-2)phys.gravityfloatVtMicroturbulent velocitykm/sspect.dopplerVelocfloat[Fe/H]MetallicitySunphys.abund.ZfloatVMAG? Absolute V magnitudemagphys.magAbs;em.opt.VfloatnullableB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableRemRemarksmeta.notecharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullable