Volume 404, Number 2, June III 2003
|Page(s)||775 - 781|
|Published online||02 June 2003|
I. The system HD 41004
School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
2 Dept. of Geophysics and Planetary Sciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
3 Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
Corresponding author: S. Zucker, email@example.com
Accepted: 25 February 2003
This paper presents an application of the TwO-Dimensional CORrelation (TODCOR) algorithm to multi-order spectra. The combination of many orders enables the detection and measurement of the radial velocities of very faint companions. The technique is first applied here to the case of HD 41004, where the secondary is 3.68 mag fainter than the primary in the V band. When applied to CORALIE spectra of this system, the technique measures the secondary velocities with a precision of and facilitates an orbital solution of the HD 41004 B subsystem. The orbit of HD 41004 B is nearly circular, with a companion of a minimum mass. The precision achieved for the primary is , allowing the measurement of a long-term trend in the velocities of HD 41004 A.
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, 2003
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