Photometry of silicon stars.
Abstract
Summary. Five of the brighter silicon stars in the list of Bidelman and Mac Connell (1973) i.e. HD 3580, HD187473, HD206653, HD207188 and HD212432, were observed at the ESO, La Silla, to search for variability in the uvby-photometric system. All of them turned out to be variable in the four channels showing obviously their largest amplitude in U (>0rn.2 in the case of HD 187473) and periods could be derived for all of them. One of the comparison stars, i.e. HD 185183, also turned out to be variable. Colour indices, amplitude, character and periodicity of the variations and a 12 A/mm spectrogram suggest that this star might be a broad-lined silicon star. Key words: Ap-stars - photometry Si-stars
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 1977
- Bibcode:
- 1977A&A....54..443H