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Proceedings Paper

CODEX: the high-resolution visual spectrograph for the E-ELT
Author(s): Luca Pasquini; G. Avila; H. Dekker; B. Delabre; S. D'Odorico; A. Manescau; M. Haehnelt; B. Carswell; R. Garcia-Lopez; R. Lopez; M. T. Osorio; R. Rebolo; S. Cristiani; P. Bonifacio; V. D'Odorico; P. Molaro; P. Spanò; F. Zerbi; M. Mayor; M. Dessauges; D. Megevand; F. Pepe; D. Queloz; S. Udry
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Paper Abstract

A number of outstanding scientific problems require a high resolution, visual spectrograph at the E-ELT. Measuring the dynamics of the universe, finding earth-like planets with radial velocity techniques, determining the chemical evolution of the intergalactic medium and if physical constants varied in the past, all require a superior capability of measuring exceedingly small Doppler shifts. We have started a Phase A study for CODEX at the E-ELT. We present here the scientific cases, the requirements, the basic technical choices and trade offs, as well as a couple of design under evaluation. We aim at a super stable instrument, capable of obtaining a radial velocity precision of 2 cm/sec over several decades. It will be located at the coude focus. The design will make use of anamorphosis, pupil slicing, slanted VPH gratings and a novel calibration system based on laser frequency combs. Several CODEX-related R&D activities are running, and, in addition, a Call for Proposal for a precursor at the VLT has been issued.

Paper Details

Date Published: 9 July 2008
PDF: 9 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70141I (9 July 2008); doi: 10.1117/12.787936
Show Author Affiliations
Luca Pasquini, European Southern Observatory (Germany)
G. Avila, European Southern Observatory (Germany)
H. Dekker, European Southern Observatory (Germany)
B. Delabre, European Southern Observatory (Germany)
S. D'Odorico, European Southern Observatory (Germany)
A. Manescau, European Southern Observatory (Germany)
M. Haehnelt, Institute of Astrophysics, Cambridge Univ. (United Kingdom)
B. Carswell, Institute of Astrophysics, Cambridge Univ. (United Kingdom)
R. Garcia-Lopez, Instituto de Astrofísica de Canarias (Spain)
R. Lopez, Instituto de Astrofísica de Canarias (Spain)
M. T. Osorio, Instituto de Astrofísica de Canarias (Spain)
R. Rebolo, Instituto de Astrofísica de Canarias (Spain)
S. Cristiani, INAF - Trieste (Italy)
P. Bonifacio, INAF - Trieste (Italy)
V. D'Odorico, INAF - Trieste (Italy)
P. Molaro, INAF - Trieste (Italy)
P. Spanò, INAF - Milan (Italy)
F. Zerbi, INAF - Milan (Italy)
M. Mayor, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
M. Dessauges, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
D. Megevand, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
F. Pepe, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
D. Queloz, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
S. Udry, Observatoire Astronomique de l'Univ. de Genève (Switzerland)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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