Volume 374, Number 2, August I 2001
|Page(s)||733 - 739|
|Section||Numerical methods and codes|
|Published online||15 August 2001|
Fundamental photon noise limit to radial velocity measurements
Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Corresponding author: F. Bouchy, Francois.Bouchy@obs.unige.ch
Accepted: 9 May 2001
In the past 5 years, improvements in radial velocity measurements have led to discovery of extra-solar planets and progress in asteroseismology programs. Doppler measurements with high precision is close to the limit given by photon noise. In this paper the methodology to compute the fundamental limit of radial velocity measurement given by photon noise is presented and illustrated with a representative sample of synthetic solar-type stellar spectra. Stellar rotational broadening, instrumental spectral range as well as spectral resolution influences are also considered. This study is applied to two dedicated spectrographs in order to help the optimization of radial velocity programs. Current methods of Doppler calculation are discussed and compared.
Key words: techniques: radial velocities / instrumentation: spectrographs / stars: oscillations / stars: planetary systems
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.