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

X. Dumusque, C. Lovis, S. Udry, N. C. Santos

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.

planetary systems, stars: activity, techniques: radial velocities

The Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution
Proceedings IAU Symposium No. 276

A. Sozzetti, M. G. Lattanzi, A. P. Boss

Cambridge University Press
Volume 6, Page 530
2011 November

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia