Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21441119d&link_type=abstract
American Astronomical Society, AAS Meeting #214, #411.19; Bulletin of the American Astronomical Society, Vol. 41, p.678
Astronomy and Astrophysics
Astronomy
Scientific paper
According to current plans, NASA's SIM mission will be launched just after the end of operations for ESA's GAIA mission. This situation provides new opportunities for long term astrometric projects that could not be done by either mission. Furthermore, many science goals of SIM will be aided by the baseline that GAIA will provide. This study is the first to analyze in detail this new situation and try to explore the benefits that can be obtained by both communities (NASA and ESA) by combining both datasets. Several practical issues must be addressed before any attempted combination of data-sets; such as the reference frame used, and the precise coordinate definition of the observable quantities. Once these hurdles are overcome, however, many science cases are opened up, including the discovery of long period exoplanets around main sequence stars and white dwarfs, the direct measurement of stellar masses through perspective acceleration, and the determination of Local Group galaxy proper motions out to Andromeda.
Anglada-Escude Guillem
Debes John H.
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