Density Growth in Anisotropic Cosmologies of Bianchi Type I

This work generalises earlier works on the growth of the density perturbations in Bianchi type I cosmologies filled with dust to include also the effects of pressure anda positive cosmological constant. For the analysis the 1+3 covariant split of space-time formalism is used. As the perturbative var...

Full description

Bibliographic Details
Main Author:	Sverin, Tomas
Format:	Others
Language:	English
Published:	Umeå universitet, Institutionen för fysik 2012
Online Access:	http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-58102

id	ndltd-UPSALLA1-oai-DiVA.org-umu-58102
record_format	oai_dc
spelling	ndltd-UPSALLA1-oai-DiVA.org-umu-581022013-01-08T13:43:14ZDensity Growth in Anisotropic Cosmologies of Bianchi Type IengSverin, TomasUmeå universitet, Institutionen för fysik2012This work generalises earlier works on the growth of the density perturbations in Bianchi type I cosmologies filled with dust to include also the effects of pressure anda positive cosmological constant. For the analysis the 1+3 covariant split of space-time formalism is used. As the perturbative variables we use scalar quantities thatare zero on the background, and hence are gauge-invariant. These variables form acoupled closed system of first-order evolution equations, that is analysed numericallyand analytically. For short wavelengths an oscillatory behavior is obtained, whereasfor long wavelengths the energy density perturbations grow unboundedly. Student thesisinfo:eu-repo/semantics/bachelorThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-58102application/pdfinfo:eu-repo/semantics/openAccess
collection	NDLTD
language	English
format	Others
sources	NDLTD
description	This work generalises earlier works on the growth of the density perturbations in Bianchi type I cosmologies filled with dust to include also the effects of pressure anda positive cosmological constant. For the analysis the 1+3 covariant split of space-time formalism is used. As the perturbative variables we use scalar quantities thatare zero on the background, and hence are gauge-invariant. These variables form acoupled closed system of first-order evolution equations, that is analysed numericallyand analytically. For short wavelengths an oscillatory behavior is obtained, whereasfor long wavelengths the energy density perturbations grow unboundedly.
author	Sverin, Tomas
spellingShingle	Sverin, Tomas Density Growth in Anisotropic Cosmologies of Bianchi Type I
author_facet	Sverin, Tomas
author_sort	Sverin, Tomas
title	Density Growth in Anisotropic Cosmologies of Bianchi Type I
title_short	Density Growth in Anisotropic Cosmologies of Bianchi Type I
title_full	Density Growth in Anisotropic Cosmologies of Bianchi Type I
title_fullStr	Density Growth in Anisotropic Cosmologies of Bianchi Type I
title_full_unstemmed	Density Growth in Anisotropic Cosmologies of Bianchi Type I
title_sort	density growth in anisotropic cosmologies of bianchi type i
publisher	Umeå universitet, Institutionen för fysik
publishDate	2012
url	http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-58102
work_keys_str_mv	AT sverintomas densitygrowthinanisotropiccosmologiesofbianchitypei
_version_	1716527049899769856

Density Growth in Anisotropic Cosmologies of Bianchi Type I

Similar Items