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Late-Type Ca II Emission-Line Stars in the Southern Hemisphere

Published online by Cambridge University Press:  12 April 2016

A.C. Collier
A.C. Collier*
Affiliation:
Physics Department, University of Canterbury, Christchurch, New Zealand

Abstract

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The results of a photometric and spectroscopic study of twenty-three late-type southern stars with strong Ca II H and K emission are presented.

The presence of photometric variability, with similar properties to the photometric wave phenomenon seen in the RS Canum Venaticorum binaries, is noted in thirteen of the fifteen stars for which extensive photometry was obtained. Of twenty stars for which high resolution radial velocity measurements were obtained, ten are found to be single-lined and seven are found to be double-lined spectroscopic binaries. The periods range from 0.66 up to 53-9 days.

Type
Session I: General Characteristics of Active Dwarfs
Information
International Astronomical Union Colloquium , Volume 71: Activity in Red-Dwarf Stars , 1983 , pp. 75 - 76
Copyright
Copyright © Reidel 1983