Precision radial velocities with an absorption cell

Details Precision radial velocities with an absorption cell Precision radial velocities with an absorption cell

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pasp...91..540c&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 91, Aug.-Sept. 1979, p. 540-545. Research supported by the National Res

Astronomy and Astrophysics

Astronomy

71

Absorption Spectra, Astronomical Photography, Hydrofluoric Acid, Radial Velocity, Astronomical Spectroscopy, Precision, Reference Systems

Scientific paper

Hydrogen fluoride has been used for generating reference absorption lines in coude spectra. This eliminates the systematic errors inherent in conventional radial velocity measurements, where the comparison beam does not follow exactly the same path as starlight. In a test of this method an accuracy of 15 m/s was achieved using sunlight. Pressure shifts have been measured for the HF 3-0 band R branch lines

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