Title | OB stars in the Small Magellanic Cloud. |
Authors | Crampton, D.; Greasley, J. |
Bibcode | 1982PASP...94...31C Search ADS ↗ |
Abstract | Spectral classification of a sample of fainter OB stars in the Small Magellanic Cloud (SMC) is used to derive a reliable distance estimate for the galaxy. Spectra of 19 stars in the SMC and six galactic stars were obtained with the CTIO 4-m Ritchey-Chretien image-tube spectrograph, and classified by comparison with standard spectra, taking into account the weakness of the metal lines in SMC spectra. Calculations of the distance moduli of each star yield a distance modulus of 19.1 magnitudes for the SMC, with a negligible foreground reddening. Comparison of H-R diagrams indicates the SMC to be 0.5 magnitudes more distant than the LMC. Line intensity tracings for the SMC stars reveal significant decreases in the line strengths of the C III, N III and Si lines of the SMC relative to the LMC and galactic stars, and allows the estimation of rotational velocities for the individual stars. |
Objects | 2 Objects Search NED ↙ |