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PEGASE: a DARWIN/TPF pathfinder

Published online by Cambridge University Press:  02 May 2006

M. Ollivier ,
J.-M. Le Duigou ,
D. Mourard ,
O. Absil ,
F. Cassaing ,
E. Herwats ,
L. Escarrat ,
B. Chazelas ,
F. Allard  and
R. Clédassou
...Show all authors
M. Ollivier
Affiliation:
Institut d'Astrophysique Spatiale (IAS), bâtiment 121, F-91405 Orsay (France), Université Paris-Sud 11 and CNRS (UMR 8617), email: marc.ollivier@ias.u-psud.fr
J.-M. Le Duigou
Affiliation:
Centre National d'Etudes Spatiales - TOULOUSE
D. Mourard
Affiliation:
Observatoire de la Côte d'Azur, Dpt GEMINI
O. Absil
Affiliation:
Université de Liège
F. Cassaing
Affiliation:
Office National d'Etudes et de Recherches Aéronautiques
E. Herwats
Affiliation:
Université de Liège
L. Escarrat
Affiliation:
Office National d'Etudes et de Recherches Aéronautiques
B. Chazelas
Affiliation:
Institut d'Astrophysique Spatiale (IAS), bâtiment 121, F-91405 Orsay (France), Université Paris-Sud 11 and CNRS (UMR 8617), email: marc.ollivier@ias.u-psud.fr
F. Allard
Affiliation:
Ecole Normale Supérieure de Lyon
R. Clédassou
Affiliation:
Centre National d'Etudes Spatiales - TOULOUSE
V. Coudé du Foresto
Affiliation:
LESIA, Observatoire de Paris
M. Delpech
Affiliation:
Centre National d'Etudes Spatiales - TOULOUSE
P. Duchon
Affiliation:
Centre National d'Etudes Spatiales - TOULOUSE
P.-Y. Guidotti
Affiliation:
Centre National d'Etudes Spatiales - TOULOUSE
A. Léger
Affiliation:
Institut d'Astrophysique Spatiale (IAS), bâtiment 121, F-91405 Orsay (France), Université Paris-Sud 11 and CNRS (UMR 8617), email: marc.ollivier@ias.u-psud.fr
X. Leyre
Affiliation:
Alcatel Alenia Space, CANNES
F. Malbet
Affiliation:
Laboratoire d'Astrophysique de l'Observatoire de Grenoble
D. Rouan
Affiliation:
LESIA, Observatoire de Paris
S. Udry
Affiliation:
Observatoire de Genève
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Abstract

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The space mission PEGASE, proposed to the CNES (Centre National d'Etudes Spatiales = French Space Agency) in the framework of its call for scientific proposals : “formation flying missions”, is a 2-aperture interferometer, composed by 3 free flying satellites (2 siderostats and 1 beam combiner), allowing baselines from 50 to 500 m in both nulling and visibility modes. With an angular resolution of a few mas and a spectral resolution of several tens in the spectral range 2.5-5 microns, PEGASE has several goals:

  1. science : spectroscopy of hot jupiters (Pegasides) and brown dwarves, exploration of the inner part of protoplanetary disks

  2. technology : validation in real space conditions of formation flying, nulling and visibility interferometry concepts.

PEGASE has been studied at a 0-level. In this paper, we summarize the scientific program and associated technological and mission trade-off coming from this 0-level study. We also discuss how PEGASE can be considered as a TPF/DARWIN pathfinder in an international roadmap towards more complex space interferometry missions such as DARWIN/TPF.

Keywords

InterferometryFormation flyingSpectroscopy of low mass objectsProtoplanetary disks
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C200: Direct Imaging of Exoplanets: Science & Techniques , October 2005 , pp. 241 - 246
Copyright
© 2006 International Astronomical Union