(2013) The GAPS programme with HARPS-N at TNG. Astronomy & Astrophysics, Volume 554 . Article number A29. doi:10.1051/0004-6361/201321155 ISSN 0004-6361.

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Abstract

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.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Astronomy & Astrophysics
Publisher:	EDP Sciences
ISSN:	0004-6361
Official Date:	2013
Dates:	Date Event 2013 Published
Volume:	Volume 554
Page Range:	Article number A29
DOI:	10.1051/0004-6361/201321155
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Seventh Framework Programme (European Commission) (FP7/2007-2013), Fundação para a Ciência e a Tecnologia (FCT), Istituto nazionale di astrofisica (Italy) (INAF)
Grant number:	239953 (FP7/2007-2013)

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