The GAPS programme with HARPS-N at TNG: II. No giant planets around the metal-poor star HIP 11952
| Autor: | Elisa Molinari, E. Carolo, I. Pagano, V. Nascimbeni, M. Rainer, Laura Affer, C. Lovis, M. Scardia, L. Mancini, E. Poretti, Francesca Faedi, A. S. Bonomo, Francesco Marzari, Riccardo Claudi, V. S. Schmid, P. Giacobbe, S. Messina, Ulisse Munari, L. R. Bedin, Alessandro Sozzetti, Giuseppina Micela, G. Piotto, E. Shkolnik, A. F. Lanza, John Southworth, G. Scandariato, A. Maggio, Mario Damasso, R. G. Gratton, N. C. Santos, E. Covino, L. Malavolta, Francesco Borsa, M. Esposito, Francesco Pepe, Rosario Cosentino, D. W. Latham, G. Hebrard, K. Biazzo, Silvano Desidera |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Physics
Earth and Planetary Astrophysics (astro-ph.EP) 010308 nuclear & particles physics High resolution Astronomy FOS: Physical sciences Astronomy and Astrophysics Context (language use) Star (graph theory) Planetary system 01 natural sciences law.invention Radial velocity Telescope Settore FIS/05 - Astronomia e Astrofisica 13. Climate action Space and Planetary Science law Planet 0103 physical sciences 010303 astronomy & astrophysics Spectrograph Astrophysics - Earth and Planetary Astrophysics |
| Popis: | 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. Comment: 5 pages, A&A, accepted |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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