J/AJ/121/2159ivo://CDS.VizieR/J/AJ/121/2159doi:10.26093/cds/vizier.51212159CDSGray R.O.Graham P.W.Hoyt S.R.2023-04-06T16:50:42Z2001-08-22T20:56:45ZCDS support team

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

cds-question@unistra.frlate-type-starsinterstellar-reddeningmetallicityeffective-temperaturePaper I (Cat. <J/AJ/121/2148>) of this series presented precise MK spectral types for 372 late A-, F-, and early G-type stars with the aim of understanding the nature of luminosity classification on the MK spectral classification system for this range of spectral types. In this paper, a multidimensional downhill simplex technique is introduced to determine the basic parameters of the program stars from fits of synthetic spectra and fluxes with observed spectra and fluxes from Strvmgren uvby photometry. This exercise yields useful calibrations of the MK spectral classification system but, most importantly, gives insight into the physical nature of luminosity classification on the MK spectral classification system. In particular, we find that in this range of spectral types, microturbulence appears to be at least as important as gravity in determining the MK luminosity type.2001AJ....121.2159Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/121/2159CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/121/2148 : Precise spectral types for 372 A-G stars (Gray+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/121/2159https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/121/2159http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/121/2159https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/121/2159https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/121/2159http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/121/2159GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/121/2159/table1 (Basic parameters of late A-, F-, and early G-Type Stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/121/2159/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/121/2159/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/121/2159/table1?GETtext/xml+votable180.050000true2.29452159.149780.0055555555555555566/62 320 333 337 342 349 460 463-464 474 485 496 753 757 1005 1024 1032 1035 1287 1436 1603 1728 1749 1769 1962 2127 2317 2340 2420 2472 2477 2598 2650 2691 2980 3001 3005 3016 3020 3031-3032 3036 3043 3051 3060 3102 3118 3138 3239 3302 3305 3342 3623 3625 3679 3724 4698 4709 4720 5154 5230 5323 5392 5490 5522 5586 6184 6255 6776 6941 7178 7763 8274 8306 8466 8476 8478 8592 8843 8845 8985 8995 9327 9403 9476 9553 9759 9774 9913 9995 10055 10375 10741 10899 11204 11296 11335 11403 11644 11647 11732 12465 12592 12845 12899 12944 12962 13099 13166 13195 13201 13222 13277 13440 13725 13955 13994 14001 14045 14180 14246 14309 14384 14469 14522 14544 14548 14609 14616 14619 14621 14650 14690 14700 14779 14906 15174 15263 15366 15494 15962 18290 18978 19045 19237 19323 19507 19585 19802 20118 20145 20178 21112 21788 22300 22947 23190 23339 23369 23438 23454 23526-23527 23532 23535 23538 23544 23547-23548 23820 25559 25617 25869-25870 25930 26521 26967 26975 27130 27268 28008 28137 28151 28439 28482 28490 28494 28551 29157 29183 29518 29864 30293 30439 30510 30576 30578 30660 30665 31125 31416 31698 31933 31976 32192 32205 32552 38806 39768 39923 40932 42988 44129https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/121/2159?format=asciiOpticaldefaultJ/AJ/121/2159/table1Basic parameters of late A-, F-, and early G-Type StarsHRThe HR (Cat. <V/50>) designationmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDThe HD (Cat. <III/135>) numbermeta.id;meta.mainintSimbadSimbad column added by the CDSmeta.refcharPaperIDisplay the data from Paper I (J/AJ/121/2148)meta.refcharNameStar namemeta.idcharE(b-y)The E(b-y) reddeningmagphot.color.excessfloatTeffThe effective temperatureKphys.temperature.effectiveintlog(g)Logarithm of the surface gravitylog(cm.s**-2)phys.gravityfloatxiMicroturbulent velocitykm/sphys.veloc.microTurbfloat[M/H]Metallicity determined by the simplex methodlog(Sun)phys.abund.Fefloat_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