Other
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184..699t&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 184, Sept. 1978, p. 699-707.
Other
10
Magellanic Clouds, Radial Velocity, Supergiant Stars, Astronomical Spectroscopy, H Alpha Line, H Ii Regions, Histograms, Spectrographs, Stellar Motions, Variable Stars, Velocity Distribution, Velocity Measurement
Scientific paper
Additional radial velocities of 28 SMC supergiants determined in the years 1959-1969 at the Radcliffe Observatory are presented. These and other measures from ESO and elsewhere are intercompared. The mean Radcliffe velocities have an internal standard error of + or - 4.7 km/s, and a systematic error exceeding 4 km/s is regarded as unlikely. Eight stars in the SMC core have a corrected velocity dispersion of only 6.9 km/s, similar to Feast's (1970) values for H II regions in the core. But the core H II regions have a velocity differential of -20 km/s relative to these stars. The velocity dispersion for stars in other parts of the Cloud is of the order of 15 km/s, as previously found. Two possibly variable-velocity stars are discussed without reaching a satisfactory conclusion.
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