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Y. Richaud
Researcher at Centre national de la recherche scientifique
Publications - 4
Citations - 166
Y. Richaud is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Telescope & Adaptive optics. The author has an hindex of 3, co-authored 4 publications receiving 153 citations.
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Proceedings ArticleDOI
The SOPHIE spectrograph: design and technical key-points for high throughput and high stability
S. Perruchot,D. Kohler,François Bouchy,Y. Richaud,Pierre Richaud,Gabriel Moreaux,M. Merzougui,R. Sottile,L. Hill,G. Knispel,X. Regal,Jean-Pierre Meunier,S. A. Ilovaisky,H. Le Coroller,D. Gillet,Jerome Schmitt,Francesco Pepe,M. Fleury,Danuta Sosnowska,P. Vors,Denis Mégevand,P. E. Blanc,C. Carol,A. Point,A. Laloge,J.-C. Brunel +25 more
TL;DR: SOPHIE as mentioned in this paper is a double-pass Schmidt echelle spectrograph associated with a high efficiency coupling fiber system, and including simultaneous wavelength calibration, which has been used to obtain accurate radial velocities.
Proceedings ArticleDOI
Higher-precision radial velocity measurements with the SOPHIE spectrograph using octagonal-section fibers
S. Perruchot,François Bouchy,François Bouchy,B. Chazelas,Rodrigo F. Díaz,Rodrigo F. Díaz,Guillaume Hébrard,Guillaume Hébrard,K. Arnaud,Luc Arnold,G. Avila,Xavier Delfosse,Isabelle Boisse,Gabriel Moreaux,F. Pepe,Y. Richaud,Alexandre Santerne,R. Sottile,D. Tezier +18 more
TL;DR: In this paper, a fiber link modification is proposed for the SOPHIE spectrograph, which includes a piece of octagonal-section fiber, having good scrambling properties, lying inside the former circular section fiber, and tested on a bench to characterize near-field and far-field scrambling properties.
Proceedings ArticleDOI
The Polychromatic Laser Guide Star for tilt measurement: progress report of the demonstrator at Observatoire de Haute Provence
R. Foy,R. Foy,Pierre Éric,Jérôme Eysseric,Françoise Claude Foy,Thierry Fusco,Julien Girard,Auguste Le Van Suu,S. Perruchot,Pierre Richaud,Y. Richaud,Xavier Rondeau,Michel Tallon,Éric Thiébaut,Michel Boer +14 more
TL;DR: In this article, the authors report results from the ATTILA experiment obtained at the 1.52 m======telescope at Observatoire de Haute-Provence, showing that the accuracy of the measurements is currently ≈ 1.5 Airy disk rms at 550 nm.
The polychromatic laser guide star : the elp-oa demonstrator at observatoire de haute provence
R. Foy,M. Chatagnat,D. Dubet,P. Éric,J. Eysseric,Francoise-Claude Foy,T. Fusco,Julien Girard,A. Laloge,A. Le Van Suu,B. Messaoudi,S. Perruchot,Pierre Richaud,Y. Richaud,X. Rondeau,Michel Tallon,Éric Thiébaut,M. Boer +17 more
TL;DR: In this article, the authors report the progress of the first demonstrator of the implementation of this concept, at Observatoire de Haute-Provence 1.52m telescope, including the beam propagation to the lasers room to the mesosphere and the algorithms for tip-tilt measurements.