J/MNRAS/485/1067ivo://CDS.VizieR/J/MNRAS/485/1067doi:10.26093/cds/vizier.74851067CDSTakeda Y.Han I.Kang D.-I.Lee B.-C.Kim K.-M.2024-08-19T20:17:04Z2022-10-20T15:17:21ZCDS support team

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

cds-question@unistra.frchemical-abundancesstellar-atmosphereseclipsing-binary-starsearly-type-starsvisible-astronomyspectroscopyA spectroscopic study was carried out on the surface chemical abundances of CNO and several heavier elements in the primary and secondary components of five eclipsing close binaries around A type (AR Aur, {beta} Aur, YZ Cas, WW Aur, and RR Lyn) in order to investigate the nature of chemical differences between both components (being comparatively slow rotators alike due to tidal synchronization). Regarding the systems comprising similar components, {beta} Aur and WW Aur were confirmed to exhibit no compositional difference between the primary and secondary both showing almost the same Am anomaly, though the chemical peculiarities in the component stars of AR Aur show distinct differences (HgMn star and Am star). In contrast, as to the systems (YZ Cas and RR Lyn) consisting of considerably different (A and early F) components, the surface abundances are markedly different between the primary (Am) and secondary (normal). These observational results may indicate Teff-dependent characteristics regarding the chemical anomalies of non-magnetic stars on the upper main sequence: (1) In the effective temperature range of 10000K>~Teff>~7000K, rotational velocity is the most important factor for determining the extent of Am peculiarity. (2) However, the emergence of the Am phenomenon seems to have a lower Teff limit at ~7000K, below which no abundance anomaly is observed regardless of stellar rotation. (3) The transition from Am anomaly (mild deficiency in CNO) to HgMn anomaly (unusually large N depletion) is likely to take place as Teff increases from ~10000K to ~11000K.2019MNRAS.485.1067Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/485/1067CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/485/1067https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/485/1067http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/485/1067https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/485/1067https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/485/1067http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/485/1067GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/485/1067/abund (Elemental abundances derived in this study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/485/1067/abund?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/485/1067/abund?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/485/1067/abund?GETtext/xml+votable180.050000true79.578733633.76736580.005555555555555556Cone search capability for table J/MNRAS/485/1067/suppl (Supplementary abundance results of 100 A-type stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/485/1067/suppl?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/485/1067/suppl?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/485/1067/suppl?GETtext/xml+votable180.050000true7.530688129.75155780.0055555555555555566/183 350 464 689 765 871 1033 1035 1153 1293 1337 1397 1675 1888 1973 2340 2371 2591 3710 3830 3882 4338 4645 4691 4724 4890 4949 5726 6082 6340 6894 6940 7089 7138 7487 7762 8690 9380 10130 11109 12698 13411 14405 14640 14687 14852 14899 14906 15859 15940 16020 17085 17194 18804 19022 19025 19519 20125 20313 20683 20861 20940 21833 22300 22917 23383 23392 23416 23426 23493 23502 23518 23526 23537-23538 23546-23547 23650 23658 23864 23963 24315 24415 25939 27102 27118 27322 28316 30274 31448 31537 31930 32061 36082 36145 36351 36711 44833 47086 48319 48552 48589 48856 48884 49121https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/485/1067?format=asciiOpticaldefaultJ/MNRAS/485/1067/abundElemental abundances derived in this studySimbadNameSimbad column added by the CDSmeta.idcharnullablee_[O/H]61Error on [O/H]61 (3)stat.error;phys.abundfloatEWO77Equivalent width of O I 7771-50.0001nmspect.line.eqWidthfloatDO77non-LTE correction for O I 7771-5arith.factorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSPSpectrummeta.ref.urlcharNameStar name (1 primary, 2 secondary)meta.id;meta.maincharf_Name[*] Flag on Name (1)meta.codecharTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloatvtMicroturbulencekm/sphys.veloc.microTurbfloatEWC53Equivalent width of C I 53800.0001nmspect.line.eqWidthfloat_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.mainvsiniProjected rotational velocity (from 7765-7785{AA} fitting)km/sphys.veloc.rotatfloatDC53non-LTE correction for C I 5380arith.factorfloat[C/H]53non-LTE C abundance from C I 5380 (2)phys.abundfloate_[C/H]53Error on [C/H]53 (3)stat.error;phys.abundfloatEWN74Equivalent width of N I 74680.0001nmspect.line.eqWidthfloatDN74non-LTE correction for N I 7468arith.factorfloat[N/H]74non-LTE N abundance from N I 7468 (2)phys.abundfloate_[N/H]74Error on [N/H]74 (3)stat.error;phys.abundfloatEWO61Equivalent width of O I 6156-80.0001nmspect.line.eqWidthfloatDO61non-LTE correction for O I 6156-8arith.factorfloat[O/H]61non-LTE O abundance from O I 6156-8 (2)phys.abundfloat[O/H]77non-LTE O abundance from O I 7771-5 (2)phys.abundfloate_[O/H]77Error on [O/H]77 (3)stat.error;phys.abundfloat[Na/H]61LTE Na abundance from 6140-6168{AA} fitting (2)phys.abundfloat[Si/H]61LTE Si abundance from 6140-6168{AA} fitting (2)phys.abundfloat[Ca/H]61LTE Ca abundance from 6140-6168{AA} fitting (2)phys.abundfloat[Ti/H]53LTE Ti abundance from 5375-5390{AA} fitting (2)phys.abundfloat[Fe/H]53LTE Fe abundance from 5375-5390{AA} fitting (2)phys.abund.Fefloat[Fe/H]61LTE Fe abundance from 6140-6168{AA} fitting (2)phys.abund.Fefloat[Fe/H]74LTE Fe abundance from 7457-7472{AA} fitting (2)phys.abund.Fefloat[Fe/H]77LTE Fe abundance from 7765-7785{AA} fitting (2)phys.abund.Fefloat[Fe/H]Average of [Fe/H]53, [Fe/H]61, [Fe/H]74, and [Fe/H]77phys.abund.Fe;stat.meanfloate_[Fe/H]Standard deviation of [Fe/H]stat.error;phys.abund.Fefloat[Ba/H]61LTE Ba abundance from 6140-6168{AA} fitting (2)phys.abundfloatJ/MNRAS/485/1067/supplSupplementary abundance results of 100 A-type stars[Ti/H]53LTE Ti abundance from 5375-5390{AA} fittingphys.abundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HD NNNNNN)meta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloatvtMicroturbulencekm/sphys.veloc.microTurbfloatvsiniProjected rotational velocitykm/sphys.veloc.rotatfloat[Na/H]61LTE Na abundance from 6146-6168{AA} fittingphys.abundfloatSimbadSimbad column added by the CDSmeta.ref.urlchar[Si/H]61LTE Si abundance from 6146-6168{AA} fittingphys.abundfloat[Ca/H]61LTE Ca abundance from 6146-6168{AA} fittingphys.abundfloat[Fe/H]61LTE Fe abundance from 6146-6168{AA} fittingphys.abundfloatHyades[H] Indicates if the star is a Hyades starmeta.notechar_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/MNRAS/485/1067/spec1Spectra in 5347-5402{AA} rangeNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmem.wldoubleFluxContinuum-normalized residual fluxphot.flux;arith.ratiodoubleJ/MNRAS/485/1067/spec2Spectra in 6127-6182{AA} rangerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharlambdaWavelength0.1nmem.wldoubleFluxContinuum-normalized residual fluxphot.flux;arith.ratiodoubleJ/MNRAS/485/1067/spec3Spectra in 7436-7503{AA} rangeFluxContinuum-normalized residual fluxphot.flux;arith.ratiodoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharlambdaWavelength0.1nmem.wldoubleJ/MNRAS/485/1067/spec4Spectra in 7746-7803{AA} rangerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmem.wldoubleFluxContinuum-normalized residual fluxphot.flux;arith.ratiodoubleNameStar namemeta.id;meta.mainchar