Astrophysics and Space Science

, Volume 186, Issue 1, pp 137–149 | Cite as

The precision of radial-velocity determinations of solar-type stars by cross-correlation

  • Kaylene Murdoch
  • J. B. Hearnshaw
Article

Abstract

The theoretical limit to the precision (defined as the inverse of the square of the random error) of a radial-velocity determination of a solar-type star obtained from the technique of digital cross-correlation is constructed as a function of simple parameters of the recording of a stellar spectrum.

The relationship is used to establish conditions for maximizing the precision for a given object, exposure time, and observing instrument. Both fibre-fed and Cassegrain-mounted spectrographs are considered.

Keywords

Exposure Time Random Error Theoretical Limit Simple Parameter Stellar Spectrum 

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Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • Kaylene Murdoch
    • 1
  • J. B. Hearnshaw
    • 1
  1. 1.Mt John University Observatory, Dept. of PhysicsUniversity of CanterburyChristchurchNew Zealand

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