| Issue |
A&A
Volume 404, Number 2, June III 2003
|
|
|---|---|---|
| Page(s) | 775 - 781 | |
| Section | Astronomical instrumentation | |
| DOI | https://doi.org/10.1051/0004-6361:20030499 | |
| Published online | 02 June 2003 | |
Multi-order TODCOR: Application to observations taken with the CORALIE echelle spectrograph*,**
I. The system HD 41004
1
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, shay@wise.tau.ac.il
Received:
2
January
2003
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
© ESO, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.