The GAPS Programme with HARPS-N@TNG II: No giant planets around the metal-poor star HIP 11952
| Autor: | Desidera, S., Sozzetti, A., Bonomo, A. S., Gratton, R., Poretti, E., Claudi, R., Latham, D. W., Affer, L., Cosentino, R., Damasso, M., Esposito, M., Giacobbe, P., Malavolta, L., Nascimbeni, V., Piotto, G., Rainer, M., Scardia, M., Schmid, V. S., Lanza, A. F., Micela, G., Pagano, I., Bedin, L., Biazzo, K., Borsa, F., Carolo, E., Covino, E., Faedi, F., Hebrard, G., Lovis, C., Maggio, A., Mancini, L., Marzari, F., Messina, S., Molinari, E., Munari, U., Pepe, F., Santos, N., Scandariato, G., Shkolnik, E., Southworth, J. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1051/0004-6361/201321155 |
| 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: | arXiv |
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