Microlensing towards the Small Magellanic Cloud --- EROS 2 two-year analysis

Details Microlensing towards the Small Magellanic Cloud --- EROS 2 two-year analysis Microlensing towards the Small Magellanic Cloud --- EROS 2 two-year analysis

1998-12-09

arxiv.org/abs/astro-ph/9812173v2

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, revised version accepted for publication in A&A Letters

Scientific paper

We present the analysis of the first two years of a search for microlensing of stars in the Small Magellanic Cloud with the EROS (Exp\'erience de Recherche d'Objets Sombres) project. A single event is detected, already present in the first year analysis. This low event rate allows us to put new constraints on the fraction of the Galactic Halo mass due to compact objects in the mass range [10^-2, 1] Msol. These limits, along with the fact that the two SMC events observed so far are probably due to SMC deflectors, suggest that LMC and SMC self-lensing may dominate the event rate.

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