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A Hipparcos census of the nearby OB associations
P. T. de Zeeuw, R. Hoogerwerf, J. H. J. de Bruijne +2
A comprehensive census of the stellar content of the nearby OB associations is presented, based on Hipparcos positions, proper motions, and parallaxes. Moving groups are identified…
GAIA: Origin and Evolution of the Milky Way
Gerry Gilmore, Michael Perryman, L Lindegren +7
GAIA is a short-listed candidate for the ESA Cornerstone mission C5, meeting the ESA Survey Committee requirement for an observatory mission, dedicated to astrometry, providing 10…
The microlensing rate and mass function vs. dynamics of the Galactic bar
HongSheng Zhao, P. Tim de Zeeuw
With the steady increase of the sample size of observed microlenses towards the central regions of the Galaxy, the main source of the uncertainty in the lens mass will shift from t…