J/A+A/512/A54ivo://CDS.VizieR/J/A+A/512/A54doi:10.26093/cds/vizier.35120054CDSCasagrande L.Ramirez I.Melendez J.Bessell M.Asplund M.2018-01-02T13:43:16Z2010-05-04T08:30:22ZCDS support team

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

cds-question@unistra.frdwarf-starsgiant-starseffective-temperatureinfrared-photometryastronomical-modelsstellar-atmospheresVarious effective temperature scales have been proposed over the years. Despite much work and the high internal precision usually achieved, systematic differences of order 100K (or more) among various scales are still present. We present an investigation based on the Infrared Flux Method aimed at assessing the source of such discrepancies and pin down their origin. We break the impasse among different scales by using a large set of solar twins, stars which are spectroscopically and photometrically identical to the Sun, to set the absolute zero point of the effective temperature scale to within few degrees. Our newly calibrated, accurate and precise temperature scale applies to dwarfs and subgiants, from super-solar metallicities to the most metal-poor stars currently known. At solar metallicities our results validate spectroscopic effective temperature scales, whereas for [Fe/H]<-2.5 our temperatures are roughly 100 K hotter than those determined from model fits to the Balmer lines and 200 K hotter than those obtained from the excitation equilibrium of Fe lines. Empirical bolometric corrections and useful relations linking photometric indices to effective temperatures and angular diameters have been derived. Our results take full advantage of the high accuracy reached in absolute calibration in recent years and are further validated by interferometric angular diameters and space based spectrophotometry over a wide range of effective temperatures and metallicities.2010A&A...512A..54Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/512/A54CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/282/899 : Teff and angular diameters from IRFM (Blackwell+ 1994)J/A+AS/129/505 : Effective temperatures by IFRM (Blackwell+ 1998)J/ApJ/626/446 : Effective temperature scale of FGK stars (Ramirez+, 2005)J/A+A/497/497 : Physical parameters from JHK flux (Gonzalez-Hernandez+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/512/A54https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/512/A54http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/512/A54https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/512/A54https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/512/A54http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/512/A54GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/512/A54/table8 (Photometric data used in the paper and stellar fundamental parameters determined via InfraRed Flux Method (IRFM))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/512/A54/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/512/A54/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/512/A54/table8?GETtext/xml+votable180.050000true40.17863191.19867560.0055555555555555566/17 60 94 118 130 146 154 373 521 571 748 798 814 1040 1147 1285 1425 1556 1969 2133 2141 2149 2622 3258 3494 3509 3662 3683 3814 4184 4211 4240 4285 4356 4376 4491 4714 4875 4901 4905 5111 5195 5406 5413 5622 5827 5914 5929 6047 6084 6130 6159 6171 6186 6226 6256 6287 6363 6385 6409 6662 6792-6793 7117 7186 7240 7286 7334 8093 8205 8210 8224 8232 8239 8274 8360 8811 8930 8966 8999 9004 9128 9247 9492 9503 9537 9801 9831 9955 9992 10359 10518 10571 10614 10920 11177 11412 11419 11709 11999 12164 12295 12340 12388 12451 12621 12704 12750 12784 12890 12934 13025 13028 13075 13311 13568 13628 13743 14298 14375 14385 14534 14576 14697 14743 14851 14881 14931 15030 15126 15174 15349 15417 15712 15838 16409 16518 16549 16680 16689 16795 16883 16935 17017 17124 17136 17206 17219 17245 17266 17314 17332 17509 17545 17606 17726 17730 17777 17782 17788 18087 18115 18123 18299 18548 18641 18887 19017 19109 19179 19206 19217 19310 19327 19347 19385 19424 19848 19903-19904 20216 20237 20273 20397 20414 20442 20862 21082 21901 21926 22125 22162 22205 22420 22475 22527 22590 23011 23061 23070 23096 23190 23323 23479 23503 23518 23526 23534 23537 23539 23542 23547 23560 23893 23978 24213 25015 25385 25444 25554 25641 25766 25773 25820 25835 25839 25854 25891 25935 25939 25966 26025 26030-26031 26158 26239 26284 26289 26357 26415 26451 26522 26576 26728 26788 26873 26906 26961 26963 26978 27018 27020 27075 27161 27163 27255 27323 27394 27443 27503 27592 27745 27756 27857 27915 27920 27948 27975 27981 27991 28035 28154 28210 28244 28265 28336 28338 28459 28494 28586 28661 29490 29549 29765 29852 29926 29999 30015 30051 30145 30176 30179 30196 30236 30296 30343 30359 30375 30465 30553 30577 30759 30779 30825 30891 30939 31011 31048 31094 31172 31411 31470 31503 31650 31666 31748 31772 31785 32034 32067 32100 32157 32335 32593 33131 33456 33515 33831 33998 34408 34684 34751 35691 35707 35710 35714 35731 35736 35753 35782 35784 35825 35913 36029 36084 36356 36727 36735 36745 37232 37479 38072 38216 38292 38443 38461 38562 39034 39283 39446 39647 39692 40488 40567 40944 41259 41460 41463 41612 41721 42022 42318 42331 42595 43296 43345 43445 43575 43649 43786 44016 44262 44281 44542 44653 44681 44792 44816 44880 44931 44951 46053 46302 46506 46565 46699 46828 46956 46997 47147 47347 47390 47512 47530 48105 48281 48614 48719 48736 48955 490278.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/512/A54?format=asciiInfrareddefaultJ/A+A/512/A54/table8Photometric data used in the paper and stellar fundamental parameters determined via InfraRed Flux Method (IRFM)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharloggSurface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicitylog(Sun)phys.abund.ZfloatmBolIRFM apparent bolometric magnitude. (Mbol_{sun}_=4.74)magphot.mag.bolfloatFbolIRFM bolometric flux (on the Earth)mW.m**-2phot.flux.boldoublee_FbolIRFM bolometric flux errormW.m**-2stat.errordoubleTeffIRFM effective temperatureKphys.temperature.effectiveinte_TeffIRFM effective temperature errorKstat.error;phys.temperature.effectiveintDiamIRFM angular diametermasphys.angSizefloate_DiamIRFM angular diameter errormasstat.errorfloatBmagJohnson apparent B magnitudemagphot.mag;em.opt.BfloatVmagJohnson apparent V magnitudemagphot.mag;em.opt.VfloatRmag? Cousins apparent R magnitudemagphot.mag;em.opt.RfloatnullableImag? Cousins apparent I magnitudemagphot.mag;em.opt.IfloatnullableJmag2MASS apparent J magnitudemagphot.mag;em.IR.JfloatHmag2MASS apparent H magnitudemagphot.mag;em.IR.HfloatKmag2MASS apparent Ks magnitudemagphot.mag;em.IR.KfloatE(B-V)Reddening correctionmagphot.color.excessfloatSimbadNameSimbad column added by the CDSmeta.idchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.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