On the Ultraviolet Photometric Variability of the Helium-Weak B Stars (from ANS Data)
Abstract
Photometric observations in the ultraviolet region obtained by the ANS satellite enabled: (1) confirmation with a slight improvement of the rotational period of HD 22470; (2) confirmation of the variability with very small amplitudes for HD 74196, a member of the open cluster IC 2391; and (3) comparison of the amplitude-wavelength relations of some other He-weak stars with known periods (HD 35298, HD 142884, HD 144334, HD 175362, and HD 109026). A preliminary rotational period for the star HD 109026 using the 11 ANS observations was found to be about 1.5 days.
- Publication:
-
IAU Colloq. 90: Upper Main Sequence Stars with Anomalous Abundances
- Pub Date:
- 1986
- DOI:
- 10.1007/978-94-009-4714-6_43
- Bibcode:
- 1986ASSL..125..271Z
- Keywords:
-
- B Stars;
- Light Curve;
- Peculiar Stars;
- Ultraviolet Photometry;
- Variable Stars;
- Open Clusters;
- Stellar Rotation;
- Astrophysics