Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21423901m&link_type=abstract
American Astronomical Society, AAS Meeting #214, #239.01; Bulletin of the American Astronomical Society, Vol. 41, p.742
Astronomy and Astrophysics
Astrophysics
Scientific paper
The European Space Agency has formally approved in spring 2006 the overall funding of its next space astrometry mission Gaia scheduled for a launch in spring 2012. The mission will create an extraordinarily precise three-dimensional map of about one billion stars throughout our Galaxy and beyond from repeated astrometric and photometric observations over about five years. End-of-mission expected accuracies in wide angle astrometry fall in the 7-25 muas range for start brighter than 15 mag and sub-mas at the faint end (20 mag). The science covered by Gaia is broad and extends from galactic and stellar astrophysics to solar systems dynamics and physics and the construction of an inertial frame in the visible with extragalactic sources. Fundamental physics with general relativity testing will also be a major product of the mission. In the presentation I will overview the Gaia science case, stressing more specifically the astrometric side of the expected results and provide few hints on the overall organisation of the data analysis entrusted to the Data Processing and Analysis Consortium (DPAC).
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