[Todos] Recordatorio: IAFE-COLOQUIOS: "¿Qué se investiga en el IAFE?: THE RE-IONIZATION OF THE UNIVERSE

["Area Difusión IAFE"]

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                        PROXIMO COLOQUIO DEL IAFE
                  Instituto de Astronomía y Física del Espacio
                            CONICET-UBA

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                       ¿Qué se investiga en el IAFE?:
                        THE RE-IONIZATION OF THE UNIVERSE

                        MIERCOLES 26 de marzo a las 14hs

                        I.F. Mirabel, V. Douna & L. Pellizza
                                 IAFE-CONICET

                               Aula del Edificio IAFE

The re-ionization of the universe that took place during the first
billon years after the Big Bang is one of the major frontiers in
cosmology. Until recently, most models of the re-ionization had considered
the ultraviolet radiation from the first generations of massive stars
as the only important factor in the process of re-ionization of the
intergalactic medium. It will be shown that besides the UV radiation of
massive stars, feedback from the fossils of those massive stars
(X-rays and relativistic jets from i.e. accreting stellar black holes and
neutron stars), played an important role determining the early thermal
history of the universe and partially ionizing the intergalactic medium
over large volumes of space. Feedback from accreting black holes and
neutron stars had a direct impact on the properties of the faintest
galaxies at high redshifts, the smallest dwarf galaxies in the local
universe, and in the solution of a basic problem in the cold dark matter
model of the universe.