EAGLE MOAO system conceptual design and related technologies
2 Pôle Astronomie du LESIA
3 GIS PHASE - Groupement d'Intérêt Scientifique du Partenariat Haute résolution Angulaire Sol-Espace
4 ONERA - The French Aerospace Lab [Châtillon]
5 Duke University [Durham]
6 ONERA
7 GEPI - Galaxies, Etoiles, Physique, Instrumentation
8 United Kingdom Astronomy Technology Ctr
9 LAM - Laboratoire d'Astrophysique de Marseille
- Fonction : Auteur
- PersonId : 1160943
- IdHAL : thierry-fusco
- ORCID : 0000-0002-0795-0856
- IdRef : 05777658X
- Fonction : Auteur
- PersonId : 1308516
- IdHAL : dgratadour
- ORCID : 0000-0003-2080-7189
- IdRef : 119639130
- Fonction : Auteur
- PersonId : 828768
- IdHAL : philippe-laporte
Résumé
EAGLE is the multi-object spatially-resolved near-IR spectrograph instrument concept for the E-ELT, relying on a distributed Adaptive Optics, so-called Multi Object Adaptive Optics. This paper presents the results of a phase A study. Using 84×84 actuator deformable mirrors, the performed analysis demonstrates that 6 laser guide stars (on an outer ring of 7.2' diameter) and up to 5 natural guide stars of magnitude R < 17, picked-up in a 7.3' diameter patrol field of view, allow us to obtain an overall performance in terms of Ensquared Energy of 35% in a 75×75mas2 resolution element at H band whatever the target direction in the centred 5' science field for median seeing conditions. In terms of sky coverage, the probability to find the 5 natural guide stars is close to 90% at galactic latitudes |b| ~ 60 deg. Several MOAO demonstration activities are also on-going.