Research Note
Reanalysis of the FEROS observations of HIP 11952 ⋆,⋆⋆
1
European Southern Observatory,
Alonso de Cordova 3107, Vitacura,
Santiago,
Chile
e-mail:
amueller@eso.org
2
Universitäts-Sternwarte München,
Ludwig-Maximilians-Universität, Scheinerstr. 1, 81679
München,
Germany
3
Max-Planck Institut für Astronomie, Königstuhl 17, 69117
Heidelberg,
Germany
4
Max-Planck Institut für Extraterrestrische Physik,
Giessenbachstrasse 1,
85748
Garching,
Germany
5
Astronomisches Rechen-Institut, Zentrum für Astronomie, Mönchhofstrasse, 12–14,
69120
Heidelberg,
Germany
6
Zentrum für Astronomie der Universität Heidelberg
(ZAH), Landessternwarte, Königstuhl
12, 69120
Heidelberg,
Germany
7
Institut für Astrophysik, Georg-August-Universität,
Friedrich-Hund-Platz 1,
37077
Göttingen,
Germany
8
Department of Radiotherapy and Radiation Oncology,
Leopoldina Hospital, Gustav-Adolf-Str.
8, 97422
Schweinfurt,
Germany
Received: 18 March 2013
Accepted: 4 June 2013
Aims. We reanalyze FEROS observations of the star HIP 11952 to reassess the existence of the proposed planetary system.
Methods. The radial velocity of the spectra were measured by cross-correlating the observed spectrum with a synthetic template. We also analyzed a large dataset of FEROS and HARPS archival data of the calibrator HD 10700 spanning over more than five years. We compared the barycentric velocities computed by the FEROS and HARPS pipelines.
Results. The barycentric correction of the FEROS-DRS pipeline was found to be inaccurate and to introduce an artificial one-year period with a semi-amplitude of 62 m s-1. Thus the reanalysis of the FEROS data does not support the existence of planets around HIP 11952.
Key words: techniques: spectroscopic / planetary systems / techniques: radial velocities / stars: individual: HIP 11952
Based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 60.A-9036, 072.C-0488, 072.C-0513, 073.C-0784, 074.C-0012, 074.D-0380, 075.C-0234, 075.D-0760, 076.C-0073, 076.C-0878, 077.A-9009, 077.C-0138, 077.C-0192, 077.C-0530, 078.A-9048, 078.C-0378, 078.C-0833, 079.A-9006, 079.A-9017, 079.C-0170, 079.C-0681, 080.A-9005, 080.A-9021, 080.C-0032, 082.A-9011, 082.C-0315, 083.A-9011, 084.A-9003, 084.A-9003, 084.A-9004, 084.A-9004, 084.A-9011, 085.A-9027, 085.A-9027, 085.C-0557, 086.A-9006, 086.A-9006, 086.A-9014, 086.A-9014, 086.D-0460, 087.A-9014, 087.C-0476, 088.A-9007, 088.A-9007.
Appendices are available in electronic form at http://www.aanda.org
© ESO, 2013