Theia: science cases and mission profiles for high precision astrometry in the future

Fabien Malbet; Lucas Labadie; Alessandro Sozzetti; Gary A. Mamon; Mike Shao; Renaud Goullioud; Alain Léger; Mario Gai; Alberto Riva; Deborah Busonero; Thierry Lépine; Manon Lizzanna; Alexis Brandeker; Eva Villaver

doi:10.1117/12.2629927

27 August 2022 Theia: science cases and mission profiles for high precision astrometry in the future

Fabien Malbet, Lucas Labadie, Alessandro Sozzetti, Gary A. Mamon, Mike Shao, Renaud Goullioud, Alain Léger, Mario Gai, Alberto Riva, Deborah Busonero, Thierry Lépine, Manon Lizzanna, Alexis Brandeker, Eva Villaver

Author Affiliations +

Proceedings Volume 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave; 121801F (2022) https://doi.org/10.1117/12.2629927
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

High-precision astrometry well beyond the capacities of Gaia will provide a unique way to achieve astrophysical breakthroughs, in particular on the nature of dark matter, and a complete survey of nearby habitable exoplanets. In this contribution, we present the scientific cases that require a flexibly-pointing instrument capable of high astrometric accuracy and we review the best mission profiles that can achieve such observations with the current space technology as well as within the boundary conditions defined by space agencies. We also describe the way the differential astrometric measurement is made using reference stars within the field. We show that the ultimate accuracy can be met without drastic constrains on the telescope stability.

Conference Presentation

Citation Download Citation

Fabien Malbet, Lucas Labadie, Alessandro Sozzetti, Gary A. Mamon, Mike Shao, Renaud Goullioud, Alain Léger, Mario Gai, Alberto Riva, Deborah Busonero, Thierry Lépine, Manon Lizzanna, Alexis Brandeker, and Eva Villaver "Theia: science cases and mission profiles for high precision astrometry in the future", Proc. SPIE 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave, 121801F (27 August 2022); https://doi.org/10.1117/12.2629927

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