0

Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Pegase: a space-based nulling interferometer

[+] Author Affiliations
J. M. Le Duigou, R. Clédassou, M. Delpech, P. Duchon, B. Meyssignac, P.-Y. Guidotti, N. Gorius

Ctr. National d'Études Spatiale (France)

M. Ollivier, A. Léger

Institut d'Astrophysique Spatiale (France)

F. Cassaing, B. Sorrente, B. Fleury

Office National d'Etudes et de Recherches Aéronautiques (France)

G. Rousset

Office National d'Etudes et de Recherches Aéronautiques (France) and Observatoire de Paris (France)

O. Absil

Univ. de Liège (Belgium)

D. Mourard, Y. Rabbia, L. Escarrat

Observatoire de la Côte d'Azur (France)

F. Malbet

Lab. d'Astrophysique de l'Observatoire de Grenoble (France)

D. Rouan

Observatoire de Paris (France)

Proc. SPIE 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, 62651M (June 13, 2006); doi:10.1117/12.671091
Text Size: A A A
From Conference Volume 6265

  • Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter
  • John C. Mather; Howard A. MacEwen; Mattheus W. M. de Graauw
  • Orlando, FL | May 24, 2006

abstract

The space based mission Pegase was proposed to CNES in the framework of its call for scientific proposals for formation flying missions. This paper presents a summary of the phase-0 performed in 2005. 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 other objectives such as 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 three satellites, 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 high associated scientific return.

© (2006) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

J. M. Le Duigou ; M. Ollivier ; A. Léger ; F. Cassaing ; B. Sorrente, et al.
"Pegase: a space-based nulling interferometer", Proc. SPIE 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, 62651M (June 13, 2006); doi:10.1117/12.671091; http://dx.doi.org/10.1117/12.671091


Access This Article
Sign In to Access Full Content
Please Wait... Processing your request... Please Wait.
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
 

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement

Buy this article ($18 for members, $25 for non-members).
Sign In