J/A+A/404/775 Radial velocities of HD 41004A/B (Zucker+, 2003)
Multi-order TODCOR: application to observations taken with the
CORALIE echelle spectrograph.
I. The system HD 41004.
Zucker, S., Mazeh, T., Santos, N.C., Udry, S., Mayor, M.
<Astron. Astrophys. 404, 775 (2003)>
=2003A&A...404..775Z 2003A&A...404..775Z
ADC_Keywords: Radial velocities ; Binaries, spectroscopic
Keywords: methods: data analysis - techniques: radial velocities -
binaries: spectroscopic - stars: individual: HD 41004 -
stars: low-mass, brown dwarfs
Abstract:
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 magnitudes 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 0.6km/s and facilitates an orbital solution of the
HD 41004B subsystem. The orbit of HD 41004B is nearly circular, with a
companion of a 19MJ minimum mass. The precision achieved for the
primary is 10m/s, allowing the measurement of a long-term trend in the
velocities of HD 41004A.
Description:
The table presents 103 measurements of the radial velocities of
HD 41004A and HD 41004B. 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 0.56km/s.
Objects:
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RA (2000) DE Designation(s)
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05 59 49.6 -48 14 23 HD 41004 = HD 41004A
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 25 103 The radial velocities of HD 41004A and HD 41004B
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Byte-by-byte Description of file: table4.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: S. Zucker
(End) Patricia Bauer [CDS] 03-Apr-2003