Spectrophotometry of peculiar B and A stars. XVII. 63 Andromedae, HD 34452, epsilon Ursae Majoris, CQ Ursae Majoris, CU Virginis, CS Virginis and beta Coronae Borealis.
Abstract
Optical region spectrophotometry results are presented for seven Ap stars. Additional data for two silicon stars, HD 34452 and CU Vir, show that both have energy distributions that can be fit by a single global model atmosphere, except for the 4200 and 5200 A broad absorption features. These features are strong in HD 34452, and show no evidence of variation, while they are weak in CU Vir but show clear evidence of variations. The energy distributions of the five cooler Ap stars cannot be fit by a single model atmosphere. CQ UMa, CS Vir and Beta CrB all show complicated variations with phase at different wavelengths. Their energy distributions show combined effects of flux redistribution and differential line blanketing. Except for Epsilon UMa, none of these five stars show evidence of variations of the 4200 or 5200 A broad absorption features.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- March 1985
- Bibcode:
- 1985A&AS...59..369P
- Keywords:
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- A Stars;
- Magnetic Stars;
- Peculiar Stars;
- Stellar Atmospheres;
- Stellar Spectrophotometry;
- Variable Stars;
- Absorption Spectra;
- Metallic Stars;
- Spectral Energy Distribution;
- Stellar Temperature;
- Astrophysics