Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 136, Number 1, April I 1999
Page(s) 193 - 204
DOI https://doi.org/10.1051/aas:1999206
Published online 15 April 1999
DOI: 10.1051/aas:1999206

Astron. Astrophys. Suppl. Ser. 136, 193-204

Autoguider locked on a fiber input for precision stellar radial velocities[*]

F. Bouchy - P. Connes

Send offprint request: F. Bouchy

Service d'Aéronomie du CNRS, BP. 3, F-91371 Verrières-le-Buisson Cedex, France
e-mail: bouchy@aerov.jussieu.fr

Received October 23; accepted December 7, 1998

Abstract:

Measurement of stellar radial velocities (RV) is one acknowledged approach for planetary-search and asteroseismology programs. We study the incomplete scrambling action of a fiber feeding a spectrograph, which leaves RV errors at a level of few m/s. Observations realised with the ELODIE fiber-fed crossed-dispersion spectrograph at the 193-cm telescope of Observatoire de Haute-Provence (OHP) are presented. A fiber-locked autoguider (called FLAG) has been specifically built to reduce the stellar-beam geometrical fluctuations within the spectrograph. With FLAG, the fiber-input plays the role of guiding detector. Automatic focusing is also accomplished by the system. The design and performance characteristics of the instrument tested at the 152-cm telescope of OHP are reviewed here.

Key words: atmospheric effects -- instrumentation: spectrographs -- techniques: radial velocities -- stars: oscillations -- planetary systems

SIMBAD Objects

Copyright The European Southern Observatory (ESO)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.