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The influence of structure formation on the evolution of the universe
Includes abstract.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Mathematics and Applied Mathematics
2014
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| _version_ | 1867613210806321152 |
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| access_status_str | Open Access |
| author | Umeh, Obinna |
| author2 | Clarkson, Chris |
| author_browse | Clarkson, Chris Umeh, Obinna |
| author_facet | Clarkson, Chris Umeh, Obinna |
| author_sort | Umeh, Obinna |
| collection | Thesis |
| description | Includes abstract. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/4938 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:31.718Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Mathematics and Applied Mathematics |
| publisherStr | Department of Mathematics and Applied Mathematics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/4938 The influence of structure formation on the evolution of the universe Umeh, Obinna Clarkson, Chris Ellis, GFR Mathematics and Applied Mathematics Includes abstract. Includes bibliographical references. The next generation of telescopes will usher in a new era of precision cosmology capable of determining key parameters of a cosmological model to percent level and beyond. For this to be effective, the theoretical model must be understood to at least the same level of precision. A range of subtle physical spacetime effcts remain to be explored theoretically, for example, the effect of backreaction on cosmological observables. A good understanding of this effect is paramount given that it is a consequence of any space-time theory of gravity. We provide a comprehensive study of this effect from the perspective of geometric averaging on a hyper-surface and averaging on the celestial sphere. We concentrate on Friedmann-Lemaitre-Robertson-Walker spacetime with small perturbation up to non-linear order . This enables us to quantify by how much this effect could change the standard model interpretation of the universe. We study in great detail key parameters of the standard model, Hubble rate, deceleration parameter and area distance. 2014-07-31T08:11:05Z 2014-07-31T08:11:05Z 2013 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/4938 eng application/pdf Department of Mathematics and Applied Mathematics Faculty of Science University of Cape Town |
| spellingShingle | Mathematics and Applied Mathematics Umeh, Obinna The influence of structure formation on the evolution of the universe |
| thesis_degree_str | Doctoral |
| title | The influence of structure formation on the evolution of the universe |
| title_full | The influence of structure formation on the evolution of the universe |
| title_fullStr | The influence of structure formation on the evolution of the universe |
| title_full_unstemmed | The influence of structure formation on the evolution of the universe |
| title_short | The influence of structure formation on the evolution of the universe |
| title_sort | influence of structure formation on the evolution of the universe |
| topic | Mathematics and Applied Mathematics |
| url | http://hdl.handle.net/11427/4938 |
| work_keys_str_mv | AT umehobinna theinfluenceofstructureformationontheevolutionoftheuniverse AT umehobinna influenceofstructureformationontheevolutionoftheuniverse |