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Detectability of Earth mass planets with RV techniques around Sun-like stars. The example of the Sun

Published online by Cambridge University Press:  10 November 2011

Anne-Marie Lagrange ,
Nadege Meunier  and
Morgan Desort
Anne-Marie Lagrange
Affiliation:
LAOG, Université J Fourier, F-38041 Grenoble Cedex, France email: [email protected], [email protected], [email protected]
Nadege Meunier
Affiliation:
LAOG, Université J Fourier, F-38041 Grenoble Cedex, France email: [email protected], [email protected], [email protected]
Morgan Desort
Affiliation:
LAOG, Université J Fourier, F-38041 Grenoble Cedex, France email: [email protected], [email protected], [email protected]
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Abstract

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We present the results of detailed simulations of the RV and astrometric signals expected from the Sun, when taking into account its activity (spots, plages, convection). To do so, we considered all structures (2,000,000) identified on the Sun surface over a full cycle. We show that the Sun activity would prevent the detection of the Earth in the Habitable Zone with RV technics with today or future forthcoming instruments, mainly because of inhomogeneous convection. We also show that the activity-induced signal would be comparatively easier for the astrometric detection of the Earth of similar planets.

Keywords

planetary systemsSun: activitystars: activitytechniques: radial velocitiesastrometry
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. 537 - 538
Copyright
Copyright © International Astronomical Union 2011

References

Desort, M., Lagrange, A.-M., Galland, F, et al. 2007, A&A, 473, 893Google Scholar
Lagrange, A.-M., Desort, M., & Meunier, N. 2010, A&A, 512, A38Google Scholar
Lagrange, A.-M., Meunier, N., Desort, M., & Malbet, F. 2011, A&A, 528, L9Google Scholar
Meunier, N., Desort, M., & Lagrange, A.-M. 2010, A&A, 512, A39Google Scholar