Photometric behavior of magnetic stars.
Abstract
Detailed three-color observations of sixteen magnetic stars are presented, and a discussion of the photometric properties of twenty-three stars observed by the author is given. The results indicate that in virtually every case, if enough data are obtained, it is possible to find periodicities in the variations. Comparison with observations obtained by other investigators shows that there is no evidence for variability of periods, amplitudes, and shapes of light curves. It is shown that the extrema of the mag- netic and light curves can be in phase as well as in antiphase. Two groups of magnetic stars are dis- tinguished according to their photometric behavior: one consists of stars having V, B - V, and U - B variations in phase, and the other consists of stars having a double wave in V and a peculiar B - V curve with a broad, flat maximum. Variations of light in the first group can be explained in terms of variable effective temperature of a visible hemisphere The results of this paper seem to support the hypothesis that the rotation is a main cause of variations of the magnetic stars
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1968
- DOI:
- 10.1086/149815
- Bibcode:
- 1968ApJ...154..945S