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Prized results from HARPS

Abstract : Searching for planets around stars with different masses probes the outcome of planetary formation for different initial conditions. The low-mass M dwarfs are also the most frequent stars in our Galaxy and potentially therefore, the most frequent planet hosts. This has motivated our search for planets around M dwarfs with HARPS. That observing program has now run for almost a decade and detected most of the known low-mass planets orbiting M dwarfs (m sin i < 20 M ⊕), including the least massive (GJ581e, m sin i = 1.9 M ⊕) and the first potentially habitable planets (GJ581c&d GJ667Cc, GJ163c). This proceeding shortly reviews the detections made with HARPS, reports on the occurrence of planets around M dwarfs and how they mesh up with planet formation theory. It also highlights our sensitivity to low-mass habitable planets, the first direct measure of ⊕ , and the recent detection of a transiting planet the size of Uranus.
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Xavier Bonfils, François Bouchy, X. Delfosse, T. Forveille, M. Gillon, et al.. Prized results from HARPS. EPJ Web of Conferences, EDP Sciences, 2013, 47, pp.05004. ⟨10.1051/epjconf/20134705004⟩. ⟨insu-03326891⟩

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