The GAPS Programme with HARPS-N@TNG II: No giant planets around the metal-poor star HIP 11952

Abstract

In the context of the program Global Architecture of Planetary Systems (GAPS), we have performed radial velocity monitoring of the metal-poor star HIP 11952 on 35 nights over about 150 days using the newly installed high resolution spectrograph HARPS-N at the TNG and HARPS at ESO 3.6m telescope. The radial velocities show a scatter of 7 m/s, compatible with the measurement errors for such a moderately warm metal-poor star (Teff = 6040+-120K; [Fe/H] =-1.9+-0.1). We then exclude the presence of the two giant planets with periods of 6.95+-0.01 d and 290.0+-16.2 d and radial velocity semi-amplitudes of 100.3+-19.4 m/s and 105.2+-14.7 m/s, respectively, which had recently been announced. This result is important considering that HIP 11952 was thought to be the most metal-poor star hosting a planetary system with giant planets, thus challenging some models of planet formation.

5 pages, A&A, accepted

References in corpus (7)

• The GAPS programme with HARPS-N at TNG. I: Observations of the Rossiter-McLaughlin effect and characterisation of the transiting system Qatar-1
• The frequency of giant planets around metal-poor stars
• A Giant Planet Around a Metal-poor Star of Extragalactic Origin
• A Keck/HIRES Doppler Search for Planets Orbiting Metal-Poor Dwarfs. I. Testing Giant Planet Formation and Migration Scenarios
• A Hot Uranus Orbiting the Super Metal-rich Star HD77338 and the Metallicity - Mass Connection
• The HARPS search for southern extra-solar planets XII. A giant planet orbiting the metal-poor star HD171028
• Planetary companions around the metal-poor star HIP 11952

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