J/A+A/426/695 Radial velocities of HD 41004A/B (Zucker+, 2004)
Multi-order TODCOR: application to observations taken with the CORALIE echelle
spectrograph.
II. A planet in the system HD41004.
Zucker S., Mazeh T., Santos N.C., Udry S., Mayor M.
<Astron. Astrophys. 426, 695 (2004)>
=2004A&A...426..695Z 2004A&A...426..695Z
ADC_Keywords: Radial velocities ; Binaries, spectroscopic
Keywords: methods: data analysis - techniques: radial velocities -
stars: binaries: spectroscopic - stars: individual: HD 41004 -
stars: low-mass, brown dwarfs
Abstract:
In previous works we reported the detection of a brown-dwarf companion
orbiting the faint stellar component of the visual binary HD41004.
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 on follow-up observations that seem to unravel
the nature of this long-term trend. The new measurements are
consistent with the presence of a 2.5MJ planet in an eccentric orbit
around HD41004A. Thus, HD41004 is a unique hierarchical system where
we have a brown-dwarf that accompanies the faint M-component, and a
planet that orbits the brighter K-component.
Description:
The table presents 149 measurements of the radial velocities of
HD41004A and HD41004B, including the first 103 which had already been
published in a previous paper (2003A&A...404..775Z 2003A&A...404..775Z). The spectra used
for the derivation were observed with CORALIE and the velocities were
derived using Multi-Order TODCOR. The precision of the primary
velocity is about 0.010km/s and the precision of the secondary is
about 0.60km/s.
Objects:
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RA (2000) DE Designation(s)
-----------------------------------------
05 59 49.6 -48 14 22.9 HD 41004A
05 59 49.6 -48 14 22.9 HD 41004B
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 25 149 The radial velocities of HD41004A and HD41004B
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See also:
J/A+A/404/775 : Radial velocities of HD 41004A/B (Zucker+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d JD Julian Date
15- 20 F6.3 km/s RVA Radial velocity of HD41004A
22- 25 F4.1 km/s RVB Radial velocity of HD41004B
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Acknowledgements: Shay Zucker
(End) Patricia Vannier[CDS] 21-Jul-2004