Spectrophotometry of peculiar B and A stars. XIV. 56 Arietis, 41 Tauri, 25 Sextantis, HD 170973, HD 205087, and HD 215441.
Abstract
Optical region spectrophotometry of six relatively hot Ap stars is presented. Additional scans of 56 Ari extend the results of an earlier paper in this series. The data for 41 Tau, 25 Sex, HD 170973, and HD 215441 are studied as a function of phase. The observations of HD 205087 are inconclusive about its variability although they show spectrophotometrically that it is a definite Ap star. The observations of HD 215441 show a prominent λ5200 broad, continuum feature with an unusual shape. However, when the data are corrected for interstellar reddening, the energy distribution resembles those of other silicon stars. The λ5200 feature is found to be variable in phase with the U-B and B-V colors and with the magnetic field strength. This feature is strongest when the Balmer jump is smallest, the Paschen continuum the bluest according to B-V, and the surface magnetic field strength the largest.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- March 1983
- Bibcode:
- 1983A&AS...51..511A
- Keywords:
-
- A Stars;
- B Stars;
- Peculiar Stars;
- Stellar Spectrophotometry;
- Continuous Spectra;
- Interstellar Extinction;
- Spectral Energy Distribution;
- Stellar Spectra;
- Variable Stars;
- Astrophysics