Issue |
A&A
Volume 554, June 2013
|
|
---|---|---|
Article Number | A29 | |
Number of page(s) | 5 | |
Section | Planets and planetary systems | |
DOI | https://doi.org/10.1051/0004-6361/201321155 | |
Published online | 30 May 2013 |
The GAPS programme with HARPS-N at TNG
II. No giant planets around the metal-poor star HIP 11952⋆,⋆⋆
1
INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio
5,
35122
Padova,
Italy
e-mail:
silvano.desidera@oapd.inaf.it
2
INAF – Osservatorio Astrofisico di Torino, via Osservatorio 20,
10025
Pino Torinese,
Italy
3 INAF – Osservatorio Astronomico di Brera, via E. Bianchi 46,
23807 Merate ( LC), Italy
4
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street,
Cambridge,
MA
02138,
USA
5
INAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento
1, 90134
Palermo,
Italy
6
INAF – Osservatorio Astrofisico di Catania, via S.Sofia 78,
9512
Catania,
Italy
7
Fundación Galileo Galilei – INAF, Rambla José Ana Fernndez Pérez,
7 38712
Breña Baja,
Spain
8
Dip. di Fisica e Astronomia Galileo Galilei – Università di
Padova, Vicolo dell’Osservatorio
2, 35122
Padova,
Italy
9 Osservatorio Astronomico della Regione Autonoma Valle
d’Aosta, Fraz. Lignan 39, 11020 Nus ( Aosta), Italy
10
Instituto de Astrofisica de Canarias, C/via Lactea S/N, 38200,
La Laguna, Tenerife,
Spain
11
Departamento de Astrofisica, Universidad de La
Laguna, 38205, La
Laguna, Tenerife,
Spain
12
Dipartimento di Fisica, Università di Trieste,
via Tiepolo 11, 34143
Trieste,
Italy
13
Observatoire Astronomique de l’Université de Genève,
51 Ch. des Maillettes –
Sauverny, 1290
Versoix,
Switzerland
14
Instituut voor Sterrenkunde, K.U. Leuven, Celestijnenlaan 200D,
3001
Leuven,
Belgium
15
INAF – Osservatorio Astronomico di Capodimonte, Salita Moiariello
16, 80131
Napoli,
Italy
16
Dipartimento di Scienza e Alta Tecnologia, Università
dell’Insubria, via Valleggio
11, 22100
Como,
Italy
17
Department of Physics, University of Warwick,
Gibbet Hill Road, Coventry, CV4 7AL, UK
18
Institut d’Astrophysique de Paris, UMR 7095 CNRS, Univ. P. & M. Curie,
98bis bd. Arago, 75014
Paris,
France
19
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117
Heidelberg,
Germany
20
Dipartimento di Fisica e Astronomia Galileo Galilei – Università
di Padova, via Marzolo
8, 35122
Padova,
Italy
21
INAF – IASF Milano, via Bassini 15, 20133
Milano,
Italy
22
Centro de Astrofísica, Universidade do Porto,
Rua das Estrelas,
4150-762
Porto,
Portugal
23
Departamento de Física e Astronomia, Faculdade de Ciências,
Universidade do Porto, 4099-002
Porto,
Portugal
24
Lowell Observatory, 1400 W. Mars Hill Road, Flagstaff, AZ
86001,
USA
25
Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Received: 23 January 2013
Accepted: 6 February 2013
In the context of the programme Global Architecture of Planetary Systems (GAPS), we have performed radial velocity monitoring of the metal-poor star HIP 11952 on 35 nights during about 150 days using the newly installed high-resolution spectrograph HARPS-N at the TNG and HARPS at the ESO 3.6 m telescope. The radial velocities show a scatter of 7 m s-1, compatible with the measurement errors for such a moderately warm metal-poor star (Teff = 6040 ± 120 K; [Fe/H] = −1.9 ± 0.1). We 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-1 and 105.2 ± 14.7 m s-1, respectively, which have recently been announced. This result is important because HIP 11952 was thought to be the most metal-poor star hosting a planetary systemwith giant planets, which challenged some models of planet formation.
Key words: stars: individual: HIP 11952 / techniques: radial velocities / planetary systems
Based on observations made with the Italian Telescopio Nazionale Galileo (TNG) operated on the island of La Palma by the Fundacion Galileo Galilei of the INAF at the Spanish Observatorio del Roque de los Muchachos of the IAC in the frame of the programme Global Architecture of Planetary Systems (GAPS). Based on observations collected at the La Silla Observatory, ESO (Chile): Program 185.D-0056.
Table 1 is available in electronic form at http://www.aanda.org
© ESO, 2013
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