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A f(R)esh take on gravity
This thesis explores perturbations in f(R) modified gravity theories, with a focus on understanding the growth of large-scale structures in the Universe. Modified gravity models, particularly f(R) theories, offer an alternative explanation for cosmic acceleration without invoking dark energy. The wo...
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| Format: | Thesis |
| Language: | English English |
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Department of Astronomy
2026
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| _version_ | 1867614533935169536 |
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| access_status_str | Open Access |
| author | Worsley, Jess |
| author2 | Dunsby, Peter Klaus |
| author_browse | Dunsby, Peter Klaus Worsley, Jess |
| author_facet | Dunsby, Peter Klaus Worsley, Jess |
| author_sort | Worsley, Jess |
| collection | Thesis |
| description | This thesis explores perturbations in f(R) modified gravity theories, with a focus on understanding the growth of large-scale structures in the Universe. Modified gravity models, particularly f(R) theories, offer an alternative explanation for cosmic acceleration without invoking dark energy. The work is divided into four key areas: foundational methods in cosmology, structure formation, perturbation theory, and the application of these methods in modified gravity models. By analysing the evolution of cosmological perturbations in these models, this research aims to provide new insights into their viability and consistency with observational data. Particular attention is given to the development of a bottom-up approach, allowing the reconstruction of gravity theories from observational constraints and bypassing the limitations of traditional model-specific methods. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/42782 |
| institution | University of Cape Town (South Africa) |
| language | English eng |
| last_indexed | 2026-06-10T12:53:33.961Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2026 |
| publishDateRange | 2026 |
| publishDateSort | 2026 |
| publisher | Department of Astronomy |
| publisherStr | Department of Astronomy |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/42782 A f(R)esh take on gravity Worsley, Jess Dunsby, Peter Klaus astronomy This thesis explores perturbations in f(R) modified gravity theories, with a focus on understanding the growth of large-scale structures in the Universe. Modified gravity models, particularly f(R) theories, offer an alternative explanation for cosmic acceleration without invoking dark energy. The work is divided into four key areas: foundational methods in cosmology, structure formation, perturbation theory, and the application of these methods in modified gravity models. By analysing the evolution of cosmological perturbations in these models, this research aims to provide new insights into their viability and consistency with observational data. Particular attention is given to the development of a bottom-up approach, allowing the reconstruction of gravity theories from observational constraints and bypassing the limitations of traditional model-specific methods. 2026-01-30T10:36:54Z 2026-01-30T10:36:54Z 2025 2026-01-30T10:34:26Z Thesis / Dissertation Masters MSc http://hdl.handle.net/11427/42782 en eng application/pdf Department of Astronomy Faculty of Science |
| spellingShingle | astronomy Worsley, Jess A f(R)esh take on gravity |
| thesis_degree_str | Master's |
| title | A f(R)esh take on gravity |
| title_full | A f(R)esh take on gravity |
| title_fullStr | A f(R)esh take on gravity |
| title_full_unstemmed | A f(R)esh take on gravity |
| title_short | A f(R)esh take on gravity |
| title_sort | f r esh take on gravity |
| topic | astronomy |
| url | http://hdl.handle.net/11427/42782 |
| work_keys_str_mv | AT worsleyjess afreshtakeongravity AT worsleyjess freshtakeongravity |