Computer Science – Performance
Scientific paper
Aug 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..771f&link_type=abstract
Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 771-776
Computer Science
Performance
3
Scientific paper
We discuss possible options for the acquisition of radial velocities in parallel with the astrometric data for the global astrometry mission GAIA, currently under study in the framework of the scientific programme of the European Space Agency. The scientific rationale of a parallel radial velocity programme, in the light of the recent evolution of the GAIA concept toward significantly fainter magnitudes, is discussed, and a possible instrument concept is presented. The approach currently being investigated could yield radial velocities accurate to ~= 10 km/s for targets as faint as V ~= 17 mag, and as accurate as ~= 1 km/s for relatively bright stars (V ~= 10-12 mag). These performance figures, derived for a realistic instrumental configuration, compatible with the GAIA configuration currently being studied, would greatly enhance the scientific return from GAIA itself, and produce significant science of its own.
Favata Fabio
Perryman Michael . A. C.
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