Cosmological implications of modified gravity: Spherical collapse and higher order correlations.

Format:

Book

Thesis/Dissertation

Author/Creator:

Borisov, A. I︠U︡.

Contributor:

Jain, Bhuvnesh, advisor.

University of Pennsylvania.

Language:

English

Subjects (All):

Astrophysics.

0596.

Penn dissertations--Physics and astronomy.

Physics and astronomy--Penn dissertations.

Local Subjects:

Penn dissertations--Physics and astronomy.

Physics and astronomy--Penn dissertations.

0596.

Physical Description:

88 pages

Contained In:

Dissertation Abstracts International 71-04B.

System Details:

Mode of access: World Wide Web.

text file

Summary:

In the Standard Model of Cosmology the nature of the Dark Energy has become one of the most significant and conceptual challenges to be resolved. One of the possible approaches to solving it is to introduce modifications to General Relativity, that include Chameleon effects, which allow for a change in the strength of gravity based on the environment. This can provide for a consistent explanation of both large-scale observations and Solar system experiments. In the task to distinguish them from the ΛCDM model of gravity, or any other competing explanation, we need to study the consequences of these modifications for the growth of perturbations. In this thesis a recently developed Chameleon f( R) modification to gravity is explored. We study its consequences for the distribution of matter on large scale using the Bispectrum. Using 1D simulations we examine the formation of galaxy and cluster halos and its observational effects. Finally we present an investigation of a method for studying gravitational lensing.

Notes:

Thesis (Ph.D. in Physics and Astronomy) -- University of Pennsylvania, 2009.

Source: Dissertation Abstracts International, Volume: 71-04, Section: B, page: 2440.

Adviser: Bhuvnesh Jain.

Local Notes:

School code: 0175.

ISBN:

9781109709421

Access Restriction:

Restricted for use by site license.