GAIA: Global Astrometric Interferometer for Astrophysics

Details GAIA: Global Astrometric Interferometer for Astrophysics GAIA: Global Astrometric Interferometer for Astrophysics

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..799l&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 799-802

Physics

8

Scientific paper

GAIA is a concept for an astrometric interferometer studied as a possible cornerstone mission within the European Space Agency's scientific programme Horizon 2000 Plus. It is envisaged to consist of two to four wide-field optical interferometers with baselines of a few metres contained in a single payload and operated in a continuously scanning mode. The target astrometric accuracy is 10 microarcsec or better for the positions, parallaxes and annual proper motions of many millions of stars, to be supplemented with spectrophotometric measurements and (possibly) radial velocities provided by on-board instrumentation. Primary scientific objectives are in the fields of galactic research, stellar physics and detection of planetary systems. The presentation is an outline of the technical concept of GAIA in the light of on-going studies.

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