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1984BASI...12..196B - Bull. Astron. Soc. India, 12, 196-201 (1984)
CA II K emission in Canopus.
BAPPU M.K.V., MEKKADEN M.V. and RAO N.K.
Abstract (from CDS):
The changes in the Ca II K line profile of the F0 supergiant Canopus have been studied from the high dispersion coude spectrograms obtained since 1975. The emission in the core of the line is variable in a timescale of few days. Similar activity seems to be occurring in Mg II h and k lines also. This is attributed to the variability in the appearance of plage areas on the stellar surface.
Abstract Copyright: ∼
Journal keyword(s): CaII K line - MgII h and k lines - chromospheres - plages
Simbad objects: 1
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