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

Published online by Cambridge University Press:  10 November 2011

Xavier Dumusque ,
Cristophe Lovis ,
Stephane Udry  and
Nuno C. Santos
Xavier Dumusque
Affiliation:
Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland email: [email protected] Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Cristophe Lovis
Affiliation:
Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland email: [email protected]
Stephane Udry
Affiliation:
Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland email: [email protected]
Nuno C. Santos
Affiliation:
Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
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Abstract

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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.

Keywords

planetary systemsstars: activitytechniques: radial velocities
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S276: The Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution , October 2010 , pp. 530 - 532
Copyright
Copyright © International Astronomical Union 2011

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