Institute of Astronomy

From the first stars to the first galaxies

SpeakerTalk DateTalk Series
Michele Trenti, KICC19 January 2012Institute of Astronomy Colloquia

Abstract

The first billion years after the Big Bang are characterized by a complex interplay between formation of the first stars (metal-free) and the first galaxies (metal-enriched). These first light sources start illuminating the Universe and ionizing hydrogen atoms, defining the initial conditions for the formation of today's stars, galaxies and black holes. The Wide Field Camera 3 on board the Hubble Space Telescope is providing us with a new view on this epoch, previously accessible only through numerical simulations. I will present an overview of the most recent results in the field, focusing on the comparison of Hubble's observations at redshift z>6 from the HUDF and BoRG surveys with theoretical/numerical models of galaxy formation and evolution.

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