Multi-order TODCOR: application to observations taken with the CORALIE echelle spectrograph I. The system HD 41004 ⋆,⋆⋆

By S. Zucker, T. Mazeh, Nuno C. Santos, S. Udry, M. University, T. Aviv, Israel, Observatoire de Geneve, Sauverny, Switzerland.. 2003

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This paper presents an application of the TwO-Dimensional CORrelation (TODCOR) algorithm to multi-order spec- tra. 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: 6k m s 1 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 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.

Subfields: Astronomy and Astrophysics

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Citations in the corpus

• Transiting exoplanets from the CoRoT space mission . VI. CoRoT-Exo-3b: the first secure inhabitant of the brown-dwarf desert (2008, background): “However, Doppler surveys have found companions to HD 41004B (Zucker et al. 2004) and HD 162020 (Udry et al. 2002) that bear some similarities with CoRoTExo-3b with a minimum masses between 10 and 20 MJup and short orbital periods.”