Microlensing and Halo Cold Dark Matter

Details Microlensing and Halo Cold Dark Matter Microlensing and Halo Cold Dark Matter

1994-11-17

arxiv.org/abs/astro-ph/9411073v3

Phys.Rev.Lett. 74 (1995) 3724-3727

Astronomy and Astrophysics

Astrophysics

8 pages, latex, 4 figures, (Minor revisions of our galactic models)

Scientific paper

10.1103/PhysRevLett.74.3724

We discuss the implications of the more than 50 microlensing events seen by the EROS, MACHO, and OGLE collaborations for the composition of the halo of our galaxy. The event rates indicate that the halo mass fraction in MACHO's is less than 30\%, consistent with expectations for a universe whose primary component is cold dark matter. We caution that the uncertainties are such that a larger MACHO fraction cannot yet be excluded.

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