Making Sense of the GAIA Catalogue

Details Making Sense of the GAIA Catalogue Making Sense of the GAIA Catalogue

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003dda....34.0301b&link_type=abstract

American Astronomical Society, DDA meeting #34, #03.01; Bulletin of the American Astronomical Society, Vol. 35, p.1035

Astronomy and Astrophysics

Astronomy

Scientific paper

In the five years from 2011 ESA's GAIA mission will conduct the first magnitude-limited astrometric survey of the whole sky. It will measure coordinates for about 109 stars to V ˜ 20. In the GAIA catalogue, stars brighter than V ˜ 15 will have parallaxes accurate to 10% out to distances R ˜ 10 kpc. Stars brighter than V ˜ 17 will have radial velocities good to a few km s-1. An elaborate series of intermediate-band colours will be measured for all stars.
I will argue that to exploit this spectacular catalogue effectively, it will be necessary to construct around it a dynamical model of the Galaxy. The model will have to be constructed iteratively and exploit techniques from solar-system dynamics much more extensively than is usual in galactic astronomy. Thus the GAIA mission challenges us to break new ground in galactic dynamics.

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