Precision radial velocities

Details Precision radial velocities Precision radial velocities

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..577c&link_type=abstract

(Astronomical Society of the Pacific, Symposium on the Renaissance in High-Resolution Spectroscopy - New Techniques, New Frontie

Astronomy and Astrophysics

Astronomy

15

Precision, Radial Velocity, Stellar Spectrophotometry, Velocity Measurement, Absorption Spectra, Fabry-Perot Spectrometers, Hydrofluoric Acid, Planetary Rotation, Spectral Line Width, Telluric Lines

Scientific paper

A number of techniques for determining stellar radial velocities with a precision better than 100 m s-1 are now becoming available. Three types of precision velocity techniques have been proposed, using for wavelength reference either telluric lines, Fabry-Perot fringes, or lines generated in an absorption cell. The author has used the latter technique, with a hydrogen fluoride cell, to obtain time series observations of Procyon on three nights. The internal error in these velocities is 10 m s-1, and the mean night-to-night difference is about 6 m s-1. These results suggest that the HF technique has good long-term stability, and therefore can be applied to the search for sub-stellar mass companions to solar-type stars.

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