J/MNRAS/386/826ivo://CDS.VizieR/J/MNRAS/386/826doi:10.26093/cds/vizier.73860826CDSEvans C.J.Howarth I.D.2024-07-06T20:16:14Z2008-06-29T16:02:06ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsradial-velocityearly-type-starsWe present radial velocities for 2045 stars in the Small Magellanic Cloud (SMC), obtained from the 2dF survey by Evans et al. (2004, Cat. J/MNRAS/353/601). The great majority of these stars are of OBA type, tracing the dynamics of the young stellar population. Dividing the sample into ad hoc `bar' and `wing' samples (north and south, respectively, of the line: delta=-77^{deg}50' + [4{alpha}]', where alpha is in minutes of time) we find that the velocities in the SMC bar show a gradient of 26.3+/-1.6km/s/deg at a position angle of 126+/-4deg. The derived gradient in the bar is robust to the adopted line of demarcation between the two samples. The largest redshifts are found in the SMC wing, in which the velocity distribution appears distinct from that in the bar, most likely a consequence of the interaction between the Magellanic Clouds that is predicted to have occurred 0.2Gyr ago. The mean velocity for all stars in the sample is +172.0+/-0.2km/s (redshifted by ~20km/s when compared to published results for older populations), with a velocity dispersion of 30km/s.2008MNRAS.386..826Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/386/826CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/353/601 : 2dF survey of the Small Magellanic Cloud (Evans+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/386/826https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/386/826http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/386/826https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/386/826https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/386/826http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/386/826GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/386/826/rv (Stellar radial velocities from the SMC 2dF survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/386/826/rv?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/386/826/rv?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/386/826/rv?GETtext/xml+votable180.050000true6.944625-73.27911110.0055555555555555565/8323-8324 8326 8329 6/33287 33291 33300 33302 33313 33315 33328https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/386/826?format=asciiOpticaldefaultJ/MNRAS/386/826/rvStellar radial velocities from the SMC 2dF surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName2dFS serial number (1)meta.id;meta.mainintRAJ2000Right Ascension J2000pos.eq.ra;meta.mainDEJ2000Declination J2000pos.eq.dec;meta.mainBmagAdopted B magnitudemagphot.mag;em.opt.Bfloatr_BmagSource of adopted B magnitude (2)meta.ref;pos.framecharSpTypeAdopted MK spectral subtype and luminosity classsrc.spTypecharRVStellar radial velocitykm/sspect.dopplerVeloc;pos.heliocentricinte_RVStandard error on the mean of RVkm/sstat.errorintNbNumber of Balmer lines measured for each starmeta.numberint