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OATS-UNI/TS SEMINAR
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Speaker: Valentina Presotto (INAF, Brera)

Title: A journey from the outskirts to the cores of groups: Colour and Mass Segregation in the 20k-zCOSMOS group sample
Date: Wednesday, July 13th, 2011
Time: 15:00
Venue: Villa Bazzoni

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Abstract: The evolution of galaxies in groups may have important implications for the global evolution of the galaxy population as a whole. The fraction of galaxies bound in groups at z~0 is as high as 60\% and many processes operating in groups may concur in shaping galaxy evolution. I will present the new results I have obtained on this topic by exploring the group-centric dependence of galaxy colours and masses at intermediate redshift using zCOSMOS and COSMOS data. I found evidence of environmental effects superimposed to secular galaxy evolution. I will interpret the results in a simple scenario where colour and mass segregation originates from different physical processes.
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Contact: Olga Cucciati (OAT)