The Light-Variability of Early B Giants.
Abstract
A list has been prepared of fifty stars brighter than ni0 = 7.0 and spectroscopically similar to Canis Majoris variables. Extensive photoelectric observations have been made on thirty-six of these, in order to discover variability in brightness. Twenty-nine of the fifty stars prove to be variable by 0.02 mag. or more. The types of variables represented are eclipsing binaries, ellipsoidal variables, CMa stars, shell stars with irregular light-variations, and stars having periodic light-variations with periods slightly longer than those of CMa stars and shorter than would be expected for ellipsoidal variables. Many of the variables cannot be classified because of irregularities or because of insufficient data. There appears to be a deficiency of known CMa stars fainter than rn0 = 5.0. This may account in part for the larger dispersion in galactic latitude for p CMa stars than for early B giants in general.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1959
- DOI:
- 10.1086/146747
- Bibcode:
- 1959ApJ...130..577L