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Long-Period Radial-Velocity Variations of Arcturus

Published online by Cambridge University Press:  12 April 2016

Alan W. Irwin ,
Bruce Campbell ,
C.L. Morbey ,
G.A.H. Walker  and
S. Yang
Alan W. Irwin
Affiliation:
University of Victoria
Bruce Campbell
Affiliation:
University of Victoria
C.L. Morbey
Affiliation:
Dominion Astrophysical Observatory
G.A.H. Walker
Affiliation:
University of British Columbia
S. Yang
Affiliation:
University of British Columbia

Extract

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We have measured the relative radial velocity of Arcturus using the HF absorption cell technique on 43 occasions from 1981 through 1985. The range of our velocities is 500 m s-1, which is much larger than our estimated internal errors (typically 10 m s-1). This confirms the radial velocity variability of Arcturus that has been previously reported by our group and others based on shorter observational time spans.

Type
2. Model Photospheres and Chemical Compositions
Information
International Astronomical Union Colloquium , Volume 106: Evolution of Peculiar Red Giant Stars , 1989 , pp. 144
Copyright
Copyright © Cambridge University Press 1989