J/PASP/98/1133ivo://CDS.VizieR/J/PASP/98/1133doi:10.26093/cds/vizier.60981133CDSNIEMELA V.S.MARRACO H.GCABANNE M.L.2025-09-09T14:15:34Z1997-12-09T21:48:12ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsopen-star-clustersccd-photometryWe present CCD photometry and spectrographic observations for stars in the open cluster NGC 346, which excites the largest H II region in the Small Magellanic Cloud. These observations show that NGC 346 is an extremely young cluster, containing more than 20 hot O-type stars. A radial-velocity study of the brightest stars, and also of the nearby supergiant Of star Sk 80, discloses atmospheric expansion due to strong stellar winds, but no large-amplitude radial-velocity variations due to short-period binary motion. However, two stars are probably longer period binaries.1986PASP...98.1133Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/98/1133CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/98/1133https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/98/1133http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/98/1133https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/98/1133https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/98/1133http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/98/1133GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/PASP/98/1133/table1NGC 346 VRI (Kron-Cousins) CCD photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIdStar numbermeta.id;meta.mainintVmagV magnitudemagphot.mag;em.opt.VfloatV-RV-R colour indexmagphot.color;em.opt.V;em.opt.RfloatV-IV-I colour indexmagphot.color;em.opt.V;em.opt.IfloatRem[1-6]? Remarks (1)meta.noteint