J/A+AS/134/489ivo://CDS.VizieR/J/A+AS/134/489CDSKeller S.C.Wood P.R.Bessell M.S.1999-03-17T04:45:24Z1999-03-17T05:44:58ZCDS support team

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

cds-question@unistra.frbe-starsmagellanic-cloudsphotometryopen-star-clustersWe present the results of a search for Be stars in six fields centered on the young clusters NGC 330 and NGC 346 in the SMC, and NGC 1818, NGC 1948, NGC 2004 and NGC 2100 in the LMC. Be stars were identified by differencing R band and narrow-band H{alpha} CCD images. Our comparatively large images provide substantial Be star populations both within the clusters and in their surrounding fields. Magnitudes, positions and finding charts are given for the 224 Be stars found. The fraction of Be stars to normal B stars within each cluster is found to vary significantly although the average ratio is similar to the average Be to B star ratio found in the Galaxy. In some clusters, the Be star population is weighted to magnitudes near the main sequence turn-off. The Be stars are redder in V-I than normal main-sequence stars of similar magnitude and the redness increases with increasing H{alpha} emission strength.1999A&AS..134..489Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/134/489CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/108/932 : Variable stars in the SMC cluster NGC 330 (Sebo+, 1994)J/A+A/317/448 : BVRHalpha photometry of NGC 1818 (Grebel 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/134/489https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/134/489http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/134/489https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/134/489https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/134/489http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/134/489GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/134/489/ngc1818 (H{alpha} emission stars near NGC 1818)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/489/ngc1818?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/489/ngc1818?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/489/ngc1818?GETtext/xml+votable180.050000true76.063333-66.4338890.005555555555555556Cone search capability for table J/A+AS/134/489/ngc2004 (H{alpha} emission stars near NGC 2004)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/489/ngc2004?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/489/ngc2004?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/489/ngc2004?GETtext/xml+votable180.050000true82.687917-67.2405560.005555555555555556Cone search capability for table J/A+AS/134/489/ngc2100 (H{alpha} emission stars near NGC 2100)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/489/ngc2100?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/489/ngc2100?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/489/ngc2100?GETtext/xml+votable180.050000true85.320833-69.210.005555555555555556Cone search capability for table J/A+AS/134/489/ngc1948 (H{alpha} emission stars near NGC 1948)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/489/ngc1948?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/489/ngc1948?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/489/ngc1948?GETtext/xml+votable180.050000true81.625417-66.2694440.005555555555555556Cone search capability for table J/A+AS/134/489/ngc330 (H{alpha} emission stars near NGC 330)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/489/ngc330?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/489/ngc330?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/489/ngc330?GETtext/xml+votable180.050000true14.039583-72.4697220.005555555555555556Cone search capability for table J/A+AS/134/489/ngc346 (H{alpha} emission stars near NGC 346)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/489/ngc346?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/489/ngc346?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/489/ngc346?GETtext/xml+votable180.050000true14.860833-72.1650.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/134/489?format=asciiOpticaldefaultJ/A+AS/134/489/ngc1818H{alpha} emission stars near NGC 1818DEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIAU designation (starting bye the cluster name)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainV-IV-I colour indexmagphot.color;em.opt.V;em.opt.IfloatR-HaR-H{alpha} colour indexmagphot.color;em.opt.R;em.IR.HfloatNamesOther names (1)meta.idcharJ/A+AS/134/489/ngc2004H{alpha} emission stars near NGC 2004recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIAU designation (starting bye the cluster name)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatV-IV-I colour indexmagphot.color;em.opt.V;em.opt.IfloatR-HaR-H{alpha} colour indexmagphot.color;em.opt.R;em.IR.HfloatNamesOther names (1)meta.idcharJ/A+AS/134/489/ngc2100H{alpha} emission stars near NGC 2100recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIAU designation (starting bye the cluster name)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatV-IV-I colour indexmagphot.color;em.opt.V;em.opt.IfloatR-HaR-H{alpha} colour indexmagphot.color;em.opt.R;em.IR.HfloatNamesOther names (1)meta.idcharJ/A+AS/134/489/ngc1948H{alpha} emission stars near NGC 1948DEJ2000Declination (J2000)pos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIAU designation (starting bye the cluster name)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatV-IV-I colour indexmagphot.color;em.opt.V;em.opt.IfloatR-HaR-H{alpha} colour indexmagphot.color;em.opt.R;em.IR.HfloatNamesOther names (1)meta.idcharJ/A+AS/134/489/ngc330H{alpha} emission stars near NGC 330recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIAU designation (starting bye the cluster name)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatV-IV-I colour indexmagphot.color;em.opt.V;em.opt.IfloatR-HaR-H{alpha} colour indexmagphot.color;em.opt.R;em.IR.HfloatNamesOther names (1)meta.idcharJ/A+AS/134/489/ngc346H{alpha} emission stars near NGC 346recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIAU designation (starting bye the cluster name)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatV-IV-I colour indexmagphot.color;em.opt.V;em.opt.IfloatR-HaR-H{alpha} colour indexmagphot.color;em.opt.R;em.IR.HfloatNamesOther names (1)meta.idchar