PEGASE: a free flying interferometer for the spectroscopy of giant exo-planets

J.-M. Le Duigou; M. Ollivier; A. Léger; F. Cassaing; B. Sorrente; B. Fleury; G. Rousset; O. Absil; D. Mourard; Y. Rabbia; L. Escarrat; F. Malbet; D. Rouan; R. Clédassou; M. Delpech; P. Duchon; B. Meyssignac; P.-Y. Guidotti; N. Gorius

doi:10.1117/12.2308110

21 November 2017 PEGASE: a free flying interferometer for the spectroscopy of giant exo-planets

J.-M. Le Duigou, M. Ollivier, A. Léger, F. Cassaing, B. Sorrente, B. Fleury, G. Rousset, O. Absil, D. Mourard, Y. Rabbia, L. Escarrat, F. Malbet, D. Rouan, R. Clédassou, M. Delpech, P. Duchon, B. Meyssignac, P.-Y. Guidotti, N. Gorius

Author Affiliations +

Proceedings Volume 10567, International Conference on Space Optics — ICSO 2006; 1056702 (2017) https://doi.org/10.1117/12.2308110
Event: International Conference on Space Optics 2006, 2006, Noordwijk, Netherlands

Abstract

This paper presents a summary of the phase-0 performed in 2005 for the Pegase mission. The main scientific goal is the spectroscopy of hot Jupiters (Pegasides) and brown dwarfs from 2.5 to 5 μm. The mission can extend to the exploration of the inner part of protoplanetary disks, the study of dust clouds around AGN,... The instrument is basically a two-aperture (D=40 cm) interferometer composed of two siderostats and one beam-combiner. The formation is linear and orbits around L2, pointing in the anti-solar direction within a +/-30° cone. The baseline is adjustable from 50 to 500 m in both nulling and visibility measurement modes. The angular resolution ranges from 1 to 20 mas and the spectral resolution is 60. in the nulling mode, a 2.5 nm rms stability of the optical path difference (OPD) and a pointing stability of 30 mas rms impose a two level control architecture. It combines control loops implemented at satellite level and control loops operating inside the payload using fine mechanisms. According to our preliminary study, this mission is feasible within an 8 to 9 years development plan using existing or slightly improved space components, but its cost requires international cooperation. Pegase could be a valuable Darwin/TPF-I pathfinder, with a less demanding, but still ambitious, technological challenge and a highly associated scientific return.

Citation Download Citation

J.-M. Le Duigou, M. Ollivier, A. Léger, F. Cassaing, B. Sorrente, B. Fleury, G. Rousset, O. Absil, D. Mourard, Y. Rabbia, L. Escarrat, F. Malbet, D. Rouan, R. Clédassou, M. Delpech, P. Duchon, B. Meyssignac, P.-Y. Guidotti, and N. Gorius "PEGASE: a free flying interferometer for the spectroscopy of giant exo-planets", Proc. SPIE 10567, International Conference on Space Optics — ICSO 2006, 1056702 (21 November 2017); https://doi.org/10.1117/12.2308110

ACCESS THE FULL ARTICLE

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY