High precision astrometry mission for the detection and characterization of nearby habitable planetary systems with the Nearby Earth Astrometric Telescope (NEAT)

Fabien Malbet 1 Alain Léger Michael Shao Renaud Goullioud Pierre-Olivier Lagage 2 Anthony G. A. Brown Christophe Cara Gilles Durand 2 Carlos Eiroa 3 Philippe Feautrier 1 Björn Jakobsson Emmanuel Hinglais Lisa Kaltenegger 4 Lucas Labadie 1 Anne-Marie Lagrange 1 Jacques Laskar 5 René Liseau 6 Jonathan Lunine 7 Jesús Maldonado Manuel Mercier Christoph Mordasini Didier Queloz 8 Andreas Quirrenbach 9 Alessandro Sozzetti Wesley Traub Olivier Absil 10 Yann Alibert 11, 12 Alexandre Humberto Andrei Frédéric Arenou 13 Charles Beichman 14 Alain Chelli 1 Charles S. Cockell 15 Gilles Duvert 1 Thierry Forveille 1 Paulo J. V. Garcia David Hobbs A. Krone-Martins 16, 17 Helmut Lammer 18 Nadège Meunier Stefano Minardi André Moitinho De Almeida Nicolas Rambaux 5, 19 Sean N. Raymond 20 Huub J. A. Röttgering 21 Johannes Sahlmann Peter A. Schuller Damien Ségransan 8 Franck Selsis 20 Jean Surdej 10 Eva Villaver Glenn J. White 22, 23 Hans Zinnecker
16 M2A 2012
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
20 SSE 2012
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
Abstract : (abridged) A complete census of planetary systems around a volume-limited sample of solar-type stars (FGK dwarfs) in the Solar neighborhood with uniform sensitivity down to Earth-mass planets within their Habitable Zones out to several AUs would be a major milestone in extrasolar planets astrophysics. This fundamental goal can be achieved with a mission concept such as NEAT - the Nearby Earth Astrometric Telescope. NEAT is designed to carry out space-borne extremely-high-precision astrometric measurements sufficient to detect dynamical effects due to orbiting planets of mass even lower than Earth's around the nearest stars. Such a survey mission would provide the actual planetary masses and the full orbital geometry for all the components of the detected planetary systems down to the Earth-mass limit. The NEAT performance limits can be achieved by carrying out differential astrometry between the targets and a set of suitable reference stars in the field. The NEAT instrument design consists of an off-axis parabola single-mirror telescope, a detector with a large field of view made of small movable CCDs located around a fixed central CCD, and an interferometric calibration system originating from metrology fibers located at the primary mirror. The proposed mission architecture relies on the use of two satellites operating at L2 for 5 years, flying in formation and offering a capability of more than 20,000 reconfigurations (alternative option uses deployable boom). The NEAT primary science program will encompass an astrometric survey of our 200 closest F-, G- and K-type stellar neighbors, with an average of 50 visits. The remaining time might be allocated to improve the characterization of the architecture of selected planetary systems around nearby targets of specific interest (low-mass stars, young stars, etc.) discovered by Gaia, ground-based high-precision radial-velocity surveys.
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https://hal.archives-ouvertes.fr/hal-00620712
Contributeur : Marie-Paule Pomies <>
Soumis le : jeudi 8 septembre 2011 - 13:45:42
Dernière modification le : jeudi 21 mars 2019 - 13:07:54

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Fabien Malbet, Alain Léger, Michael Shao, Renaud Goullioud, Pierre-Olivier Lagage, et al.. High precision astrometry mission for the detection and characterization of nearby habitable planetary systems with the Nearby Earth Astrometric Telescope (NEAT). Experimental Astronomy, springer Link, 2012, 34 (2), pp.385-413. 〈10.1007/s10686-011-9246-1〉. 〈hal-00620712〉

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