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Disentangling planetary orbits from stellar activity in radial-velocity surveys

Haywood, R. D. ; Cameron, A. Collier ; Queloz, D. ; Barros, S.C.C. ; Deleuil, M. ; Fares, R. ; Gillon, M. ; Hatzes, A. ; Lanza, A.F. ; Lovis, C. ; Moutou, C. ; Pepe, F. ; Pollacco, D. ; Santerne, A. ; Ségransan, D. ; Unruh, Y.

In: International Journal of Astrobiology, 2014, vol. 13, no. 2, p. 155-157

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    Titre
    • Disentangling planetary orbits from stellar activity in radial-velocity surveys
    Auteur
    • Haywood, R. D.. School of Physics and Astronomy, University of St. Andrews, St Andrews KY16 9SS, UK
    • Cameron, A. Collier. School of Physics and Astronomy, University of St. Andrews, St Andrews KY16 9SS, UK
    • Queloz, D.. Observatoire de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
    • Barros, S.C.C.. Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
    • Deleuil, M.. Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
    • Fares, R.. School of Physics and Astronomy, University of St. Andrews, St Andrews KY16 9SS, UK
    • Gillon, M.. Institut d'Astrophysique et de Géophysique, Universite de Liège, Allée du 6 août 17, Bat. B5C, 4000 Liège, Belgium
    • Hatzes, A.. Thüringer Landessternwarte, D-07778 Tautenburg, Germany
    • Lanza, A.F.. INAF-Osservatorio Astrofisico di Catania, via S. Sofia, 78 - 95123 Catania, Italy
    • Lovis, C.. Observatoire de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
    • Moutou, C.. Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
    • Pepe, F.. Observatoire de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
    • Pollacco, D.. Department of Physics, University of Warwick, Coventry CV4 7AL, UK
    • Santerne, A.. Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
    • Ségransan, D.. Observatoire de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
    • Unruh, Y.. Astrophysics Group, Blackett Laboratory, Imperial College London, London SW7 2AZ, UK
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • International Journal of Astrobiology, 2014, vol. 13, no. 2, p. 155-157. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:289293
    Summary
    The majority of extra-solar planets have been discovered (or confirmed after follow-up) through radial-velocity (RV) surveys. Using ground-based spectrographs such as High Accuracy Radial Velocity Planetary Search (HARPS) and HARPS-North, it is now possible to detect planets that are only a few times the mass of the Earth. However, the presence of dark spots on the stellar surface produces RV signals that are very similar in amplitude to those caused by orbiting low-mass planets. Disentangling these signals has thus become the biggest challenge in the detection of Earth-mass planets using RV surveys. To do so, we use the star's lightcurve to model the RV variations produced by spots. Here we present this method and show the results of its application to CoRoT-7