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Stellar activity

Published online by Cambridge University Press:  04 August 2017

D. K. Duncan
D. K. Duncan*
Affiliation:
Mt Wilson and Las Campanas Observatory, 813 Santa Barbara Street, Pasadena CA 91101, United States of America

Abstract

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We have been monitoring the CaII H and K emission in late-type giant stars using the Mt Wilson 60-inch telescope. It is a continuation of work that Olin Wilson began almost 20 years ago. As a result not only have starspot cycles been detected (equivalent to the solar sunspot cycle), but rotation periods have now been measured.

Type
II. Photometric Research Programmes
Information
Symposium - International Astronomical Union , Volume 118: Instrumentation and Research Programmes for Small Telescopes , 1986 , pp. 283
Copyright
Copyright © Reidel 1986