Gravitational microlensing by the dark halo of M31
Philippe Jetzer
Abstract
It has been shown by Paczyński that gravitational microlensing is potentially a useful method for detecting the dark constituents of the halo of our galaxy, if their mass lies in the approximate domain 10-6<M/M<10-1. Microlensing observations now im progress monitor several millions of stars in the Large Magellanic Cloud and in the Galactic Bulge. Here I discuss the main features of the microlensing events: in particular their rates and probability.
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