Radial velocities of SMC massive stars

DOI

We 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' andwing' 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.

Cone search capability for table J/MNRAS/386/826/rv (Stellar radial velocities from the SMC 2dF survey)

Identifier
DOI http://doi.org/10.26093/cds/vizier.73860826
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/386/826
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/386/826
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/386/826
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/386/826
Provenance
Creator Evans C.J.; Howarth I.D.
Publisher CDS
Publication Year 2008
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy