Limits on Galactic Dark Matter with 5 Years of EROS SMC Data

Details Limits on Galactic Dark Matter with 5 Years of EROS SMC Data Limits on Galactic Dark Matter with 5 Years of EROS SMC Data

2002-12-06

arxiv.org/abs/astro-ph/0212176v2

Astron.Astrophys. 400 (2003) 951-956

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures. Accepted for publication in A&A

Scientific paper

Five years of EROS data towards the Small Magellanic Cloud have been searched for gravitational microlensing events, using a new, more accurate method to assess the impact of stellar blending on the efficiency. Four long-duration candidates have been found which, if they are microlensing events, hint at a non-halo population of lenses. Combined with results from other EROS observation programs, this analysis yields strong limits on the amount of Galactic dark matter made of compact objects. Less than 25% of a standard halo can be composed of objects with a mass between 2 10^-7 Msol and 1 Msol at the 95% C.L.

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