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Precise Radial Velocities and Radial Velocity Standards

Published online by Cambridge University Press:  04 August 2017

G. A. H. Walker ,
J. Amor ,
S. Yang  and
B. Campbell
G. A. H. Walker
Affiliation:
University of British Columbia, Vancouver
J. Amor
Affiliation:
University of British Columbia, Vancouver
S. Yang
Affiliation:
University of British Columbia, Vancouver
B. Campbell
Affiliation:
Dominion Astrophysical Observatory

Abstract

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By imposing absorption lines of HF in stellar spectra we can measure changes in r.v. with a precision of ~10m/s from a single spectrum, provided stellar line profiles are not distorted by atmospheric motions. The precision of absolute radial velocities is currently limited to ~100m/s by knowledge of rest wavelengths. Representative results are presented from our three, active PRV programs: velocity variations of δ Scuti stars; a search for unseen companions to late-type stars; and routine observations of certain IAU velocity ‘standards’.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 111: Calibration of Fundamental Stellar Quantities , 1985 , pp. 587 - 589
Copyright
Copyright © Reidel 1985 

References

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Yang, S., Walker, G.A.H., Fahlman, G.G., and Campbell, B. 1982, Publ. Astron. Soc. Pacific, 94, 317.Google Scholar