J/A+A/364/455ivo://CDS.VizieR/J/A+A/364/455doi:10.26093/cds/vizier.33640455CDSLarsen S.S.Clausen J.V.Storm J.2001-03-18T22:06:11Z2001-03-18T23:05:42ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsb-starsccd-photometryvisible-astronomymedium-band-photometryThe individual reddenings for B stars in two fields in the Small Magellanic Cloud (SMC) and two fields in the Large Magellanic Cloud (LMC) are determined by means of Stroemgren uvby CCD photometry. In both LMC fields we find a foreground reddening of E(B-V)=0.085+/-0.02, and for the SMC fields we find E(B-V)=0.070+/-0.02. In addition to the foreground reddening we find contributions from reddening intrinsically in the Clouds up to E(B-V)~0.21. The intrinsic contribution is not correlated with position within our ~6'x4.5' CCD fields but varies in an essentially random way. Unless the reddening is measured for a particular object, it will be uncertain by +/-0.035 (best case, far from the central bars) to more than +/-0.10 (close to the central bars). The Stroemgren uvby photometry has been used to derive metallicities for GK giant stars in the observed fields. Adopting average reddenings we obtain mean metallicities which are consistent with those found from spectroscopic studies of F and G supergiants (Westerlund, 1997, The Magellanic Clouds, Cambridge University Press), but with a considerable scatter in the derived metallicities, from [Fe/H]=~-2.0 to [Fe/H]>0. A significant fraction of the scatter is, however, due to reddening variations rather than being intrinsic. The possible existence of high metallicity stars should be investigated further using spectroscopic methods.2000A&A...364..455Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/364/455CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/364/455https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/364/455http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/364/455https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/364/455https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/364/455http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/364/455GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/364/455/tab982 (Data for HV 982 field (LMC))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/364/455/tab982?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/364/455/tab982?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/364/455/tab982?GETtext/xml+votable180.050000true82.363625-69.19827780.005555555555555556Cone search capability for table J/A+A/364/455/tab1433 (Data for HV 1433 field (SMC))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/364/455/tab1433?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/364/455/tab1433?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/364/455/tab1433?GETtext/xml+votable180.050000true11.68975-73.66094440.005555555555555556Cone search capability for table J/A+A/364/455/tab11284 (Data for HV 11284 field (SMC))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/364/455/tab11284?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/364/455/tab11284?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/364/455/tab11284?GETtext/xml+votable180.050000true12.3570833-72.89208330.005555555555555556Cone search capability for table J/A+A/364/455/tab12578 (Data for HV 12578 field (LMC))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/364/455/tab12578?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/364/455/tab12578?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/364/455/tab12578?GETtext/xml+votable180.050000true80.2824167-66.31236110.0055555555555555566/33097 33100 33114 33294 33317https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/364/455?format=asciiOpticaldefaultJ/A+A/364/455/tab982Data for HV 982 field (LMC)yposCCD Y coordinatepixpos.cartesian.y;instr.detfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStars sequential numbermeta.idintxposCCD X coordinatepixpos.cartesian.x;instr.detfloatRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitude from Stroemgren y bandmagphot.mag;em.opt.Vfloatb-y(b-y) colour indexmagphot.color;em.opt.B;em.opt.Vfloatm1? m_1_ colour index (1)magphot.colorfloatnullablec1? c_1_ colour index (1)magphot.colorfloatnullablee_VmagVmag errormagstat.errorfloate_b-y(b-y) errormagstat.errorfloate_m1? (m_1_) error (1)magstat.errorfloatnullablee_c1? (c_1_) error (1)magstat.errorfloatnullable2_ymagChi-Square (y)stat.fit.chi2float2_bmagChi-Square (b)stat.fit.chi2float2_vmag? Chi-Square (v) (1)stat.fit.chi2floatnullable2_umag? Chi-Square (u) (1)stat.fit.chi2floatnullableJ/A+A/364/455/tab1433Data for HV 1433 field (SMC)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStars sequential numbermeta.idintxposCCD X coordinatepixpos.cartesian.x;instr.detfloatyposCCD Y coordinatepixpos.cartesian.y;instr.detfloatRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitude from Stroemgren y bandmagphot.mag;em.opt.Vfloatb-y(b-y) colour indexmagphot.color;em.opt.B;em.opt.Vfloatm1? m_1_ colour index (1)magphot.colorfloatnullablec1? c_1_ colour index (1)magphot.colorfloatnullablee_VmagVmag errormagstat.errorfloate_b-y(b-y) errormagstat.errorfloate_m1? (m_1_) error (1)magstat.errorfloatnullablee_c1? (c_1_) error (1)magstat.errorfloatnullable2_ymagChi-Square (y)stat.fit.chi2float2_bmagChi-Square (b)stat.fit.chi2float2_vmag? Chi-Square (v) (1)stat.fit.chi2floatnullable2_umag? Chi-Square (u) (1)stat.fit.chi2floatnullableJ/A+A/364/455/tab11284Data for HV 11284 field (SMC)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStars sequential numbermeta.idintxposCCD X coordinatepixpos.cartesian.x;instr.detfloatyposCCD Y coordinatepixpos.cartesian.y;instr.detfloatRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitude from Stroemgren y bandmagphot.mag;em.opt.Vfloatb-y(b-y) colour indexmagphot.color;em.opt.B;em.opt.Vfloatm1? m_1_ colour index (1)magphot.colorfloatnullablec1? c_1_ colour index (1)magphot.colorfloatnullablee_VmagVmag errormagstat.errorfloate_b-y(b-y) errormagstat.errorfloate_m1? (m_1_) error (1)magstat.errorfloatnullablee_c1? (c_1_) error (1)magstat.errorfloatnullable2_ymagChi-Square (y)stat.fit.chi2float2_bmagChi-Square (b)stat.fit.chi2float2_vmag? Chi-Square (v) (1)stat.fit.chi2floatnullable2_umag? Chi-Square (u) (1)stat.fit.chi2floatnullableJ/A+A/364/455/tab12578Data for HV 12578 field (LMC)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStars sequential numbermeta.idintxposCCD X coordinatepixpos.cartesian.x;instr.detfloatyposCCD Y coordinatepixpos.cartesian.y;instr.detfloatRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitude from Stroemgren y bandmagphot.mag;em.opt.Vfloatb-y(b-y) colour indexmagphot.color;em.opt.B;em.opt.Vfloatm1? m_1_ colour index (1)magphot.colorfloatnullablec1? c_1_ colour index (1)magphot.colorfloatnullablee_VmagVmag errormagstat.errorfloate_b-y(b-y) errormagstat.errorfloate_m1? (m_1_) error (1)magstat.errorfloatnullablee_c1? (c_1_) error (1)magstat.errorfloatnullable2_ymagChi-Square (y)stat.fit.chi2float2_bmagChi-Square (b)stat.fit.chi2float2_vmag? Chi-Square (v) (1)stat.fit.chi2floatnullable2_umag? Chi-Square (u) (1)stat.fit.chi2floatnullable