ELODIE: A spectrograph for accurate radial velocity measurements
A. Baranne,Didier Queloz,Michel Mayor,G. Adrianzyk,G. Knispel,D. Kohler,D. Lacroix,Jean-Pierre Meunier,G. Rimbaud,A. Vin +9 more
TLDR
The ELODIE spectrograph of the Observatoire de Haute-Provence (OHP) as mentioned in this paper was designed as an updated version of the cross-correlation spectrometer CORAVEL to perform very accurate radial velocity measurements.Abstract:
The bre{fed echelle spectrograph of Observatoire de Haute{Provence, ELODIE, is presented. This instrument has been in operation since the end of 1993 on the 1.93 m telescope. ELODIE is designed as an updated version of the cross{correlation spectrometer CORAVEL, to perform very accurate radial velocity measurements such as needed in the search, by Doppler shift, for brown{dwarfs or giant planets orbiting around nearby stars. In one single exposure a spectrum at a resolution of 42000 (=) ranging from 3906 A to 6811 Ai s recorded on a 10241024 CCD. This performance is achieved by using a tan = 4 echelle grating and a combination of a prism and a grism as cross{disperser. An automatic on{line data treatment reduces all the ELODIE echelle spectra and computes cross{correlation functions. The instrument design and the data reduction algorithms are described in this paper. The eciency and accuracy of the instrument and its long term instrumental stability allow us to measure radial velocities with an accuracy better than 15 m s 1 for stars up to 9th magnitude in less than 30 minutes exposure time. Observations of 16th magnitude stars are also possible to measure velocities at about 1 km s 1 accuracy. For classic spectroscopic studies (S=N>100) 9th magnitude stars can be observed in one hour exposure time.read more
Citations
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Journal ArticleDOI
Detection of Planetary Transits Across a Sun-like Star.
TL;DR: High-precision, high-cadence photometric measurements of the star HD 209458 are reported, which is known from radial velocity measurements to have a planetary-mass companion in a close orbit and the detailed shape of the transit curve due to both the limb darkening of thestar and the finite size of the planet is clearly evident.
Journal ArticleDOI
The HARPS search for southern extra-solar planets - XXXI. The M-dwarf sample
Xavier Bonfils,X. Delfosse,Stéphane Udry,T. Forveille,Michel Mayor,C. Perrier,François Bouchy,Michaël Gillon,Christophe Lovis,Francesco Pepe,Didier Queloz,Nuno C. Santos,Damien Ségransan,Jean-Loup Bertaux +13 more
TL;DR: In this paper, the authors used a fraction of the guaranteed time on the ESO/HARPS spectrograph to estimate the radial velocities of 102 southern nearby M dwarfs, and then applied systematic searches for long-term trends, periodic signals, and Keplerian orbits.
Journal ArticleDOI
LAMOST spectral survey — An overview
TL;DR: LAMOST (Large sky Area Multi-Object fiber Spectroscopic Telescope) is a Chinese national scientific research facility operated by National Astronomical Observatories, Chinese Academy of Sciences (NAOC) as mentioned in this paper.
Journal ArticleDOI
The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD108147 and HD168746
Francesco Pepe,M. Mayor,F. Galland,Dominique Naef,D. Queloz,Nuno C. Santos,Stéphane Udry,M. Burnet +7 more
TL;DR: In this article, the authors presented the discovery of two Saturn-mass companions to HD108147 and HD168746 by means of the CORALIE echelle spectrograph.
Journal ArticleDOI
Radial Velocities for 889 Late-Type Stars*
David L. Nidever,Geoffrey W. Marcy,Geoffrey W. Marcy,R. Paul Butler,Debra A. Fischer,Steven S. Vogt +5 more
TL;DR: In this article, the authors report radial velocities for 844 FGKM-type main-sequence and subgiant stars and 45 K giants, most of which had either low-precision velocity measurements or none at all.
References
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Book
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TL;DR: In this article, the authors modelled very low-mass stars and brown dwarfs and investigated the evolution of low-Mass stars and Brown dwarfs in the Southern Sky using spectral properties and luminosity functions.
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