TY - JOUR
T1 - Multi-order TODCOR
T2 - Application to observations taken with the CORALIE echelle spectrograph I. The system HD 41004
AU - Zucker, S.
AU - Mazeh, T.
AU - Santos, N. C.
AU - Udry, S.
AU - Mayor, M.
PY - 2003/6
Y1 - 2003/6
N2 - 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 0.6km s-1 and facilitates an orbital solution of the HD 41004 subsystem. The orbit of HD 41004 B is nearly circular, with a companion of a 19 Mj minimum mass. The precision achieved for the primary is 10 m s-1, allowing the measurement of a long-term trend in the velocities of HD 41004 A.
AB - 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 0.6km s-1 and facilitates an orbital solution of the HD 41004 subsystem. The orbit of HD 41004 B is nearly circular, with a companion of a 19 Mj minimum mass. The precision achieved for the primary is 10 m s-1, allowing the measurement of a long-term trend in the velocities of HD 41004 A.
KW - Methods: data analysis
KW - Stars: binaries: spectroscopic
KW - Stars: individual: HD 41004
KW - Stars: low-mass, brown dwarfs
KW - Techniques: radial velocities
UR - http://www.scopus.com/inward/record.url?scp=0037872279&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:20030499
DO - 10.1051/0004-6361:20030499
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AN - SCOPUS:0037872279
SN - 0004-6361
VL - 404
SP - 775
EP - 781
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 2
ER -