CODEX: the high-resolution visual spectrograph for the E-ELT

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; Michel Mayor; M. Dessauges; D. Megevand; F. Pepe; Didier Queloz; S. Udry

doi:10.1117/12.787936

9 July 2008 CODEX: the high-resolution visual spectrograph for the E-ELT

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, Michel Mayor, M. Dessauges, D. Megevand, F. Pepe, Didier Queloz, S. Udry

Author Affiliations +

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 70141I (2008) https://doi.org/10.1117/12.787936
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

Citation Download Citation

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, Michel Mayor, M. Dessauges, D. Megevand, F. Pepe, Didier Queloz, and S. Udry "CODEX: the high-resolution visual spectrograph for the E-ELT", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70141I (9 July 2008); https://doi.org/10.1117/12.787936

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