Probing primordial non-Gaussianity using large scale structure

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dc.contributor.advisorBassett, Bruceen_ZA
dc.contributor.advisorBlake, Chrisen_ZA
dc.contributor.authorFantaye, Yabebalen_ZA
dc.date.accessioned2014-08-13T13:57:55Z
dc.date.available2014-08-13T13:57:55Z
dc.date.issued2009en_ZA
dc.descriptionIncludes abstract.en_ZA
dc.descriptionIncludes bbliographical references (leaves 65-69).en_ZA
dc.description.abstractRecent 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.en_ZA
dc.identifier.apacitationFantaye, Y. (2009). <i>Probing primordial non-Gaussianity using large scale structure</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Astronomy. Retrieved from http://hdl.handle.net/11427/6101en_ZA
dc.identifier.chicagocitationFantaye, Yabebal. <i>"Probing primordial non-Gaussianity using large scale structure."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Astronomy, 2009. http://hdl.handle.net/11427/6101en_ZA
dc.identifier.citationFantaye, Y. 2009. Probing primordial non-Gaussianity using large scale structure. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Fantaye, Yabebal AB - 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. DA - 2009 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2009 T1 - Probing primordial non-Gaussianity using large scale structure TI - Probing primordial non-Gaussianity using large scale structure UR - http://hdl.handle.net/11427/6101 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/6101
dc.identifier.vancouvercitationFantaye Y. Probing primordial non-Gaussianity using large scale structure. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Astronomy, 2009 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/6101en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Astronomyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherCosmologyen_ZA
dc.titleProbing primordial non-Gaussianity using large scale structureen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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