Extragalactic Dark Matter Halos and QSO Properties through Gravitational Microlensing

E. Guerras, / E. Mediavilla / J. A. Muñoz

In this talk a review will be made on the most recent work of our group in the field of gravitational microlensing in the extragalactic domain. Based upon information derived from parametrized sets of magnification maps, we offer an interpretation of the spectra of some real lensed sistems that leads to important conclusions regarding different aspects of lens galaxies and QSO, namely the structure of the -otherwise unresolved- quasar accretion disk, or the low content in MACHOs of the dark matter halos at cosmological distances (see Mediavilla et al. 2009ApJ...706.1451M)