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Title:
Dark matter revealed. More evidence from faint-star proper-motions for a cool and warm component of the local dark matter in the Galaxy
Authors:
Méndez, R. A.
Affiliation:
AA(European Southern Observatory, Casilla 19001, Santiago 19, Chile)
Publication:
Astronomy and Astrophysics, v.395, p.779-788 (2002) (A&A Homepage)
Publication Date:
12/2002
Origin:
A&A
A&A Keywords:
stars: Population II, stars: white dwarfs, stars: kinematics, stars: distances, stars: luminosity function
DOI:
10.1051/0004-6361:20021222
Bibliographic Code:
2002A&A...395..779M

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. Based on observations collected with the Hubble Space Telescope, which is operated by AURA, Inc., under contract with the National Science Foundation.
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