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Issue A&A
Volume 395, Number 3, December I 2002
Page(s) 779 - 788
Section Galactic structure and dynamics
DOI http://dx.doi.org/10.1051/0004-6361:20021222



A&A 395, 779-788 (2002)
DOI: 10.1051/0004-6361:20021222

Dark matter revealed

More evidence from faint-star proper-motions for a cool and warm component of the local dark matter in the Galaxy
R. A. Méndez

European Southern Observatory, Casilla 19001, Santiago 19, Chile
(Received 24 April 2002 / Accepted 12 July 2002)

Abstract
We present new evidence, based on faint HST proper-motions, for a bi-modal kinematic population of old white dwarfs, representative of the Thick-Disk and Halo of our Galaxy. This evidence supports the idea of a massive Halo comprised of faint and old white dwarfs, along with an extant population of Thick-Disk white dwarfs. We show how most of the required dark matter in the solar vicinity can be accounted for by the remnants from these two components together.


Key words: stars: Population II -- stars: white dwarfs -- stars: kinematics -- stars: distances -- stars: luminosity function

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© ESO 2002


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