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Stellar noise and planet detection. II. Radial-velocity noise induced by magnetic cycles
X. Dumusque, C. Lovis, S. Udry +1
For the 451 stars of the HARPS high precision program, we study correlations between the radial-velocity (RV) variation and other parameters of the Cross Correlated Function (CCF).…
Stellar noise and planet detection. I. Oscillations, granulation and sun-like spots
X. Dumusque, N. C. Santos, S. Udry +2
Spectrographs like HARPS can now reach a sub-m/s precision in radial-velocity (RV) (Pepe & Lovis 2008). At this level of accuracy, we start to be confronted with stellar noise prod…
The HARPS search for southern extrasolar planets XXV. Results from the metal-poor sample
N. C. Santos, M. Mayor, X. Bonfils +10
Searching for extrasolar planets around stars of different metallicity may provide strong constraints to the models of planet formation and evolution. In this paper we present the…
Planetary detection limits taking into account stellar noise. I. Observational strategies to reduce stellar oscillation and granulation effects
Xavier Dumusque, Stephane Udry, Christophe Lovis +2
The radial velocity signature of stellar noise is small, around the meter-per-second, but already too much for the detection of Earth mass planets in habitable zones. In this paper…