School of Astronomy

School of Astronomy (SoA) Weekly Seminar

Distinguishing Modified Gravity(MG) from smooth Dark Energy(sDE) models by reconstructed gravitational slip parameter in palatini formalism

Shant Baghram (Sharif Univ. of Tech.)

Abstract:

In this talk, we consider the structure formation in modified gravity theories in Palatini formalism.
using the inverse method, we reconstructed the dynamics of universe, modified gravity action and matter density of universe
by SNAP simulated supernova data. In the next step we found out the the gravitational slip parameter as a function of wavenumber and redshift and used its effect on ISW as a cosmological probe to distinguish between DE and MG models.

Wednesday / 27-January-2010 / 7-Bahman-1388/ 2:00 PM

IPM Larak Building, School of Astronomy
Address: Larak Garden, opposite Araj, Artesh Highway,Tehran, Iran
E-mail: astro(at)ipm.ir