MICROLENSING RATES FROM SELF-CONSISTENT GALACTIC MODELS

We study different models of dark matter distribution for the halo of our galaxy. In particular, we consider Eddington and King-Michie model s, which include anisotropy in the velocity space, and we compute in a self-consistent way the amount of dark matter present in the halo. As suming that the dark matter is in form of massive astrophysical compac t halo objects (MACHOs), we find for each model the expected number of microlensing events and their average time duration for an experiment monitoring stars in the Large Magellanic Cloud (LMC). The main effect of including anisotropy is to reduce the microlensing rate and the me an MACHO mass by about 30%, as compared to the standard halo model, wh ereas the mean event duration increases noticeably. Consideration of d ifferent luminous models for the visible part of the galaxy also induc es variations in the microlensing results by roughly the same amount a s mentioned above.