Additional radial velocities of supergiants in the Small Magellanic Cloud

Open Access
Publisher Website
Google Scholar
Abstract
Additional radial velocities of 28 SMC supergiants determined in the years 1959–69 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 ± 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 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 15 km/s as previously found. Two possibly variable-velocity stars are discussed, without reaching a satisfactory conclusion.

This publication has 0 references indexed in Scilit: