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The Puzzling K and Early-M Giants: A Summary of Precise Radial Velocity Results for 15 Stars

Published online by Cambridge University Press:  12 April 2016

Ana M. Larson ,
Stephenson L. S. Yang  and
Gordon A. H. Walker
Ana M. Larson
Affiliation:
Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195
Stephenson L. S. Yang
Affiliation:
Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria, B.C. V8W 3P6, Canada
Gordon A. H. Walker
Affiliation:
Department of Geophysics and Astronomy, University of British Columbia, Vancouver, B.C. V6T 1Z4, Canada

Abstract

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Nearly a decade ago, “yellow giants” were introduced as a new class of low-amplitude radial-velocity variable stars. In this report we discuss new results for 12 spectral type K and early-M giants based on long-term monitoring using both the hydrogen-fluoride and iodine-cell techniques. We compare these results with those of published data for 3 additional stars (ϒ Cephei, β Geminorum, and β Ophiuchi), and discuss possible implications for the underlying physical mechanism(s).

Type
Part 5. Variable Stars
Information
International Astronomical Union Colloquium , Volume 170: Precise Stellar Radial Velocities , 1999 , pp. 193 - 203
Copyright
Copyright © Astronomical Society of the Pacific 1999

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