"Gravitational microlensing as a way to probe dark matter"
Relatore: Prof. Philippe Jetzer- Institute for Theoretical Physics, University of Zurich
Note: Seminario di Dipartimento
07 Novembre 2011 ore 16.00
|I will present the basics of gravitational microlensing
and then discuss its applications to find dark matter
in the halo of our Galaxy as well as in the halo of the M31
galaxy. Present results indicate that the halo
is made at most up to 20\% by compact objects which can act as lenses. Several thousands of microlensing events
have been observed towards the galactic center.
Thanks to these observations one can get information
on the galactic structure as well as on the stellar initial mass function, especially for low mass stars.
Gravitational microlensing is also a powerful tool to detect
planets in our Galaxy and in M31 as well.