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Probing primordial non-Gaussianity using large scale structure
Includes abstract.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Astronomy
2014
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| _version_ | 1867613277811376128 |
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| access_status_str | Open Access |
| author | Fantaye, Yabebal |
| author2 | Bassett, Bruce |
| author_browse | Bassett, Bruce Fantaye, Yabebal |
| author_facet | Bassett, Bruce Fantaye, Yabebal |
| author_sort | Fantaye, Yabebal |
| collection | Thesis |
| description | Includes abstract. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/6101 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:35.758Z |
| 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 Astronomy |
| publisherStr | Department of Astronomy |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/6101 Probing primordial non-Gaussianity using large scale structure Fantaye, Yabebal Bassett, Bruce Blake, Chris Cosmology Includes abstract. Includes bbliographical references (leaves 65-69). Recent evidence from the WMAP satellite has lead to a tentative detection of non-Gaussianity. Using the bispectrum statistic applied to the MegaZ catalogue of over 600,000 luminous red galaxies we find new bounds on the large-scale nonGaussianity. We constrain the fNL parameter using a particular type of triangular configuration as well as the combination of all the possible triangles in harmonic space. The constraint on fNL from the combination of all possible triangular configurations is ffV'ial = 57 ± 52 with 68% confidence limit, which is consistent with vanishing primordial non-Gaussianity, although some triangular configurations on their own suggest a non-zero bispectrum which, if confirmed, would have a profound effect on modern cosmology. 2014-08-13T13:57:55Z 2014-08-13T13:57:55Z 2009 Master Thesis Masters MSc http://hdl.handle.net/11427/6101 eng application/pdf Department of Astronomy Faculty of Science University of Cape Town |
| spellingShingle | Cosmology Fantaye, Yabebal Probing primordial non-Gaussianity using large scale structure |
| thesis_degree_str | Master's |
| title | Probing primordial non-Gaussianity using large scale structure |
| title_full | Probing primordial non-Gaussianity using large scale structure |
| title_fullStr | Probing primordial non-Gaussianity using large scale structure |
| title_full_unstemmed | Probing primordial non-Gaussianity using large scale structure |
| title_short | Probing primordial non-Gaussianity using large scale structure |
| title_sort | probing primordial non gaussianity using large scale structure |
| topic | Cosmology |
| url | http://hdl.handle.net/11427/6101 |
| work_keys_str_mv | AT fantayeyabebal probingprimordialnongaussianityusinglargescalestructure |