Other
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jrasc..99r.135b&link_type=abstract
Journal of the Royal Astronomical Society of Canada, Vol. 99, No. 4, p.135
Other
Scientific paper
We present results from the simultaneous radial velocity and line profile monitoring of cool giant stars. Spectroscopic observations with resolving power of R = 100,000 were made using the University of Western Ontario's Elginfield Observatory. The radial-velocity measurements use telluric lines within the spectrograph as a reference against which the stellar spectra are compared. Our technique avoids contamination of the observed stellar spectrum by the reference spectrum, a commonly encountered problem in precision radialvelocity measurements. We are then able to measure line-depth ratios and other spectroscopic parameters of interest in concert with the radial-velocity measurements. This approach is useful for studies of pulsation, granulation variations, surface features, magnetic cycles, non-radial oscillations, and orbital motion arising from extra-solar planets or binary-star companions.
Brown Kevin
Gray David F.
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