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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Alessandra Silvestri


PIRSA:15030103  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Approaches to tests of gravity on cosmological scales
Abstract: More than a decade after its discovery, cosmic acceleration still  poses a puzzle for modern cosmology and a plethora of models of dark energy  or modified gravity, able to reproduce the observed expansion history, have  been proposed as alternatives to the cosmological... read more
Date: 31/03/2015 - 11:00 am

PIRSA:07100002  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Scale-dependent growth of structures in viable f(R) theories
Abstract: f(R) theories are an alternative approach at the phenomenon of cosmic acceleration, in which the Einstein-Hilbert action for gravity is modified by adding a function of the Ricci scalar, f(R). While at the background level viable f(R) models must closely mimic LCDM, the difference in their predictio... read more
Date: 02/10/2007 - 2:00 pm

PIRSA:07050031  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Dynamics of Linear Perturbations in Modified Gravity Theories
Abstract: A modification of Gravity in the low-curvature regime may account for the late time acceleration of our universe, and is therefore an interesting alternative to Dark Energy.In such models, the modified Einstein equations admit self-accelerated solutions in the presence of negligible matter. At the l... read more
Date: 18/05/2007 - 11:30 am
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