SIMBAD references

2008MNRAS.386..826E - Mon. Not. R. Astron. Soc., 386, 826-834 (2008/May-2)

Kinematics of massive stars in the Small Magellanic Cloud.


Abstract (from CDS):

We present radial velocities for 2045 stars in the Small Magellanic Cloud (SMC), obtained from the 2dF survey by Evans et al. 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: δ = -77°50' + [4α]', where α is the right ascension in minutes of time) we find that the velocities in the SMC bar show a gradient of 26.3±1.6 km/s/deg at a position angle of 126°±4°. 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 probably a consequence of the interaction between the Magellanic Clouds that is predicted to have occurred 0.2 Gyr ago. The mean velocity for all stars in the sample is +172.0±0.2 km/s (redshifted by ∼20 km/s when compared to published results for older populations), with a velocity dispersion of 30 km/s.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): stars: early-type - stars: fundamental parameters - galaxies: kinematics and dynamics - Magellanic Clouds

VizieR on-line data: <Available at CDS (J/MNRAS/386/826): rv.dat>

Simbad objects: 2056

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