Stellar noise and planet detection. II. Radial-velocity noise induced by magnetic cycles

Details Stellar noise and planet detection. II. Radial-velocity noise induced by magnetic cycles Stellar noise and planet detection. II. Radial-velocity noise induced by magnetic cycles

2010-11-25

arxiv.org/abs/1011.5581v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

2 pages, 2 figures, to appear in the proceedings of the 276th IAU Symposium "The Astrophysics of Planetary Systems"

Scientific paper

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). After a careful target selection, we found a very good correlation between the slope of the RV-activity index (log(R'HK) correlation and the Teff for dwarf stars. This correlation allow us to correct RV from magnetic cycles given the activity index and the Teff.

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