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OATS-DAUT SEMINAR
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Speaker: Andrea Biviano (INAF/OATS)
Title: Cluster feeding filaments are the "Paths of Glory" of galaxy evolution
Date: Thursday, November 18th, 2010
Time: 12:00
Venue: Villa Bazzoni
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Abstract: The study of the distribution of galaxy
luminosities (i.e the luminosity function, LF) in different
environments provides constraints on the physics of galaxy
evolution. The infrared (IR) LF is a particularly useful tool since it
is directly related to the distribution of galaxy star-formation rates
(SFRs). I here present the determination of the galaxy IR LF as a
function of the environment in a supercluster at redshift 0.23, which
contains a massive cluster and a large-scale filament of galaxies.
The analysis is based on multiwavelength data, which include optical,
near-IR, and mid- to far-IR photometry, as well as redshifts from
optical spectroscopy. I show that the filament (respectively, the
core) contains the highest (respectively, the lowest) fraction of
IR-bright galaxies at all levels of IR luminosities, as well as the
highest (respectively, the lowest) average SFR per galaxy. I provide
an interpretation of these results in terms of a plausible scenario
for the different paths of galaxy evolution in and around clusters.
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contact: Andrea Biviano (OATS)