| Issue |
A&A
Volume 395, Number 3, December I 2002
|
|
|---|---|---|
| Page(s) | 779 - 788 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20021222 | |
| Published online | 18 November 2002 | |
Dark matter revealed*
More evidence from faint-star proper-motions for a cool and warm component of the local dark matter in the Galaxy
European Southern Observatory, Casilla 19001, Santiago 19, Chile
Corresponding author: rmendez@eso.org
Received:
24
April
2002
Accepted:
12
July
2002
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
© ESO, 2002
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