Contatto di riferimento: Eros Vanzella
Partecipanti: Matteo Bianconi (Institute for Astro- and Particle Physics, University of Innsbruck)
Abstract:
"Cluster of galaxies are ideal to study the effect of environment on galaxy evolution.
We studied the clusters Abell 983 and 1731, targeted with a multiwavelength campaign of
observations that include deep infrared Spitzer and near-IR Palomar imaging, and optical
WIYN spectroscopy. The observations cover the vast range of possible environments, from
the very dense cluster centre to the very rarefied cluster outskirts and accretion regions.
The analysis of the specific star formation rate reveals evidences of galaxy pre-processing
on a filament-like structure, extending from Abell 1731. Furthermore, the decrease in
number of star forming galaxies and AGN towards the cores of both clusters suggests
that the dense environment is accelerating the ageing process of galaxies and blocking
further accretion of cold gas that fuels both star formation and black hole accretion activity."
The seminar will start at 14:00 in the seminar room (-1)