Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.576..681b&link_type=abstract
"Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576). Held at the Observatoire de Paris-Me
Astronomy and Astrophysics
Astronomy
1
Astrometry, Methods Numerical, Globular Clusters General
Scientific paper
With a targeted accuracy of 10 µas yr-1 at V = 15 mag, Gaia will be able to determine the space motions of most galactic globular clusters with an accuracy of a few km s-1 or better. This will dramatically improve our knowledge of how globular clusters evolve and how they and the Milky Way as a whole have formed. It will also be possible to follow tidal streams from dissolving clusters over many orbits by kinematically selecting their members, which will constrain the form of the galactic potential and give important insights into the nature of dark matter. We illustrate how Gaia will improve our knowledge on the kinematics and dynamics of globular clusters and what can be learned by comparing the observational data from Gaia with the results of large scale NBODY simulations, possible with e.g., GRAPE6 or the future GRAPE8 computers.
Baumgardt Holger
Kroupa Pavel
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