Linearized Treatment of Scalar perturbations in the Asymptotic Cosmological Model

Details Linearized Treatment of Scalar perturbations in the Asymptotic Cosmological Model Linearized Treatment of Scalar perturbations in the Asymptotic Cosmological Model

2009-08-10

arxiv.org/abs/0908.1354v2

Astropart.Phys. 32 (2010) 330-339

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 5 figures. Presentation in sections 2 and 3 clarified, references added. Final version to appear in Astroparticle Ph

Scientific paper

10.1016/j.astropartphys.2009.10.

In this paper the implications of a recently proposed phenomenological model of cosmology, the Asymptotic Cosmological Model (ACM), on the behavior of scalar perturbations are studied. Firstly we discuss new fits of the ACM at the homogeneous level, including fits to the Type Ia Supernovae UNION dataset, first CMB peak of WMAP5 and BAOs. The linearized equations of scalar perturbations in the FRW metric are derived. A simple model is used to compute the CMB temperature perturbation spectrum. The results are compared with the treatment of perturbations in other approaches to the problem of the accelerated expansion of the universe.

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