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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 421576.0, MPI für Astronomie / Publikationen_mpia
The Gaia mission: science, organization and present status
Authors:Lindegren, L.; Babusiaux, C.; Bailer-Jones, C.; Bastian, U.; Brown, A. G. A.; Cropper, M.; Høg, E.; Jordi, C.; Katz, D.; van Leeuwen, F.; Luri, X.; Mignard, F.; de Bruijne, J. H. J.; Prusti, T.
Language:English
Publisher:Cambridge Univ. Press
Place of Publication:Cambridge
Date of Publication (YYYY-MM-DD):2008
Title of Proceedings:A Giant Step: from Milli- to Micro-arcsecond Astrometry
Start Page:217
End Page:223
Title of Series:IAU Symposium
Volume (in Series):248
Name of Conference/Meeting:IAU Symposium
Review Status:not specified
Audience:Not Specified
Abstract / Description:The ESA space astrometry mission Gaia will measure the positions, parallaxes and proper motions of the 1 billion brightest stars on the sky. Expected accuracies are in the 7 25 muas range down to 15 mag and sub-mas accuracies at the faint limit (20 mag). The astrometric data are complemented by low-resolution spectrophotometric data in the 330 1000 nm wavelength range and, for the brighter stars, radial velocity measurements. The scientific case covers an extremely wide range of topics in galactic and stellar astrophysics, solar system and exoplanet science, as well as the establishment of a very accurate, dense and faint optical reference frame. With a planned launch around 2012 and an (extended) operational lifetime of 6 years, final results are expected around 2021. We give a brief overview of the science goals of Gaia, the overall project organisation, expected performance, and some key technical features and challenges.
Free Keywords:astrometry; Galaxy: kinematics and dynamics; planetary systems; relativity; space vehicles; stars: fundamental parameters; techniques: photometric; techniques: radial velocities
Comment of the Author/Creator:Date: 2008, n/a 1, 2008
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008IAUS..248..217L [ID No:1]
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