Procedures for radial velocities of close binaries from spectra obtained with the Lick echelle-CCD spectrometer

Details Procedures for radial velocities of close binaries from spectra obtained with the Lick echelle-CCD spectrometer Procedures for radial velocities of close binaries from spectra obtained with the Lick echelle-CCD spectrometer

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..189p&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 106, no. 696, p. 189-199

Astronomy and Astrophysics

Astronomy

21

Eclipsing Binary Stars, Image Processing, Radial Velocity, Stellar Orbits, Charge Coupled Devices, Echelle Gratings, Main Sequence Stars, Spectrometers, Stellar Luminosity, Stellar Rotation, Stellar Spectrophotometry

Scientific paper

Procedures are described for processing the raw data and analyzing them for radial velocities from spectra of close binary stars observed with the charge coupled device (CCD)-echelle Hamilton spectrometer on the 3-m Shane telescope at the Lick Observatory. Interactive Data Reduction and Analysis Facility (IRAF) software is used. Extensive tests are carried out on stars of standard velocity of types late F to K and on synthetic binaries made from a sky spectrum, with a range of rotational velocities, luminosity ratios, and separation of the lines of the components. The results from the standard stars are satisfactory at the 0.2 km/sec level. The measured velocities in the synthetic binaries show that small corrections, not of a strongly systematic nature, are indicated for the larger rotational velocities, at the 2 km/sec level.

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