EROS 2 proper motion survey: Constraints on the halo white dwarfs

Details EROS 2 proper motion survey: Constraints on the halo white dwarfs EROS 2 proper motion survey: Constraints on the halo white dwarfs

2002-05-30

arxiv.org/abs/astro-ph/0205537v2

Astronomy and Astrophysics

Astrophysics

5 pages, 2 postscript figures, accepted for publication in A&A. Requires aa,epsfig,slashbox,natbib

Scientific paper

10.1051/0004-6361:20020827

We are conducting a 377-square-degree proper motion survey in the ~V and I bands in order to determine the cool white dwarf contribution to the Galactic dark matter. Using the 250 square degrees for which we possess three epochs, and applying selection criteria designed to isolate halo-type objects, we find no candidates in a 5500 pc^3 effective volume for old, fast M_V=17 white dwarfs. We check the detection efficiency by cross-matching our catalogue with Luyten's NLTT catalogue. The halo white dwarf contribution cannot exceed 5% (95% C.L.) for objects with M_V=17 and 1

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