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Št. zadetkov: 2
Spherical collapse in covariant Galileon theory
Emilio Bellini, Nicola Bartolo, Sabino Matarrese
Izvirni znanstveni članek
Oznake: modified gravity;cosmological perturbation theory;dark energy theory;
In this paper we study the evolution of a spherical matter overdensity in the context of the recently introduced Galileon field theory. Our analysis considers the complete covariant Lagrangian in four dimensions. This theory is composed by a potential and a standard kinetic term, a cubic kinetic ter ...
Leto: 2012 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Matter bispectrum in cubic Galileon cosmologies
Nicola Bartolo, Emilio Bellini, Daniele Bertacca, Sabino Matarrese
Izvirni znanstveni članek
Oznake: modified gravity;Galileon;matter bispectrum;cosmological perturbations;
In this paper we obtain the bispectrum of dark matter density perturbations in the frame of covariant cubic Galileon theories. This result is obtained by means of a semi-analytic approach to second-order perturbations in Galileon cosmologies, assuming Gaussian initial conditions. In particular, we s ...
Leto: 2013 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Št. zadetkov: 2
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