Title:　The VIMOS Ultra Deep survey, initial phases of galaxy assembly 10-13Gyr back in the Universe　　

Speaker: Olivier Le Fèvre (Laboratoire d'Astrophysique de Marseille )　　

Time: Thursday, 3:00pm, April 22nd　　

Location: Lecture Hall, 3rd floor　　

   Understanding the first phases of galaxy evolution remains a key goal of modern astrophysics. What are the main processes responsible for the build-up of mass and those driving the star-formation rate ? How does the Hubble sequence build-up? What is the effect of environment in these early epochs?

   To answer these questions requires to go beyond the small volumes and small numbers of galaxies observed at epochs earlier than 10 Gyr look-back time, and, importantly to secure the spectroscopic identification of galaxies from large surveys.

   I will present the VIMOS Ultra-Deep Survey (VUDS), a large spectroscopic redshift survey with the ESO-VLT. More than 10000 galaxies have been observed, identifying ~5000 galaxies with 2