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Astrophysics

Title: Extrasolar planets and brown dwarfs around A-F type stars V. A planetary system found with HARPS around the F6IV-V star HD 60532

Abstract: Aims: In the frame of the search for extrasolar planets and brown dwarfs around early-type stars, we present the results obtained for the F-type main-sequence star HD 60532 (F6V) with HARPS.
Methods: Using 147 spectra obtained with HARPS at La Silla on a time baseline of two years, we study the radial velocities of this star.
Results: HD 60532 radial velocities are periodically variable, and the variations have a Keplerian origin. This star is surrounded by a planetary system of two planets with minimum masses of 1 and 2.5 Mjup and orbital separations of 0.76 and 1.58 AU respectively. We also detect high-frequency, low-amplitude (10 m/s peak-to-peak) pulsations. Dynamical studies of the system point toward a possible 3:1 mean-motion resonance which should be confirmed within the next decade.
Comments: 7 pages, 11 figures, accepted for publication in A&A
Subjects: Astrophysics (astro-ph)
DOI: 10.1051/0004-6361:200810241
Cite as: arXiv:0809.3862 [astro-ph]
  (or arXiv:0809.3862v1 [astro-ph] for this version)

Submission history

From: Morgan Desort [view email]
[v1] Tue, 23 Sep 2008 08:22:24 GMT (1267kb,D)