CA ii EMISSION VARIABILITY IN BY DRACONIS

• Published in: Publications of the Astronomical Society of the Pacific Vol. 89; no. 527; pp. 69 - 70
• Main Authors: BOPP, BERNARD W., FERLAND, GARY
• Format: Journal Article
• Language: English
• Published: The Astronomical Society of the Pacific 01.02.1977
• Subjects: Astronomical photometry; Emission line stars; Emission spectra; Optical filters; Plages; Spectrophotometry; Variable stars

Photoelectric spectrophotometry of the Can K emission line in the flare star BY Dra during 1975 shows no evidence for variability over the 3ḍ8 rotation period. Apparently the K-line emission is produced uniformly over the stellar surface, and is not localized in plage regions. Concurrent variations...