Volume 426, Number 2, November I 2004
|Page(s)||695 - 698|
|Section||Planets and planetary systems|
|Published online||11 October 2004|
Multi-order TODCOR: Application to observations taken with the CORALIE echelle spectrograph*,**
II. A planet in the system HD 41004
Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland e-mail: Shay.Zucker@obs.unige.ch
2 School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
3 Centro de Astronomia e Astrofísica da Universidade de Lisboa, Observatório Astronómico de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal
Accepted: 17 June 2004
In previous works we reported the detection of a brown-dwarf companion orbiting the faint stellar component of the visual binary HD 41004. This had been achieved by applying the multi-order TwO-Dimensional CORrelation (TODCOR) algorithm to CORALIE spectra. A long-term trend of the primary component had also been detected. In this paper we report follow-up observations that seem to unravel the nature of this long-term trend. The new measurements are consistent with the presence of a planet in an eccentric orbit around HD 41004 A. Thus, HD 41004 is a unique hierarchical system with a brown dwarf that accompanies the faint M-component, and a planet that orbits the brighter K-component.
Key words: methods: data analysis / techniques: radial velocities / stars: binaries: spectroscopic / stars: individual: HD 41004 / stars: low-mass, brown dwarfs
Based on observations collected at the La Silla Observatory, ESO (Chile), with the CORALIE spectrograph at the 1.2-m Euler Swiss telescope
© ESO, 2004
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