Southern voids : structure and cosmological implications

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dc.contributor.advisorFairall, Anthony Patricken_ZA
dc.contributor.authorAndersson, Yuri Luis Escutiaen_ZA
dc.date.accessioned2016-03-04T16:51:39Z
dc.date.available2016-03-04T16:51:39Z
dc.date.issued1997en_ZA
dc.descriptionBibliography: pages 107-113.en_ZA
dc.description.abstractA review of standard cosmology theory and observational results is presented. The main tool for investigating large-scale structure in this thesis is a visually compiled void catalogue. Void selection effects that cause the detected distribution of voids to differ from the true distribution are discussed and suggestions are made for how to correct for these effects in the catalogue. The geometrical distribution of voids is then studied by dividing the void catalogue into two parts - wall voids and non-wall voids. The wall voids are smaller with typical radii of around 150 km s-¹ whereas non-wall voids have a mean radius of approximately 1150 km s-¹. The non-wall, and therefore, the larger voids are distributed isotropically and their correlation function is found to correspond roughly to that of Abell clusters, thus suggesting a link between the two structures. A relation between the velocity dispersions of clusters and the void radii is found using a spherical collapse model for structure formation. The ratio of these two quantities is used to put constraints on the cosmic density parameter 0 and observational data indicate that the universe is open.en_ZA
dc.identifier.apacitationAndersson, Y. L. E. (1997). <i>Southern voids : structure and cosmological implications</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Astronomy. Retrieved from http://hdl.handle.net/11427/17508en_ZA
dc.identifier.chicagocitationAndersson, Yuri Luis Escutia. <i>"Southern voids : structure and cosmological implications."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Astronomy, 1997. http://hdl.handle.net/11427/17508en_ZA
dc.identifier.citationAndersson, Y. 1997. Southern voids : structure and cosmological implications. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Andersson, Yuri Luis Escutia AB - A review of standard cosmology theory and observational results is presented. The main tool for investigating large-scale structure in this thesis is a visually compiled void catalogue. Void selection effects that cause the detected distribution of voids to differ from the true distribution are discussed and suggestions are made for how to correct for these effects in the catalogue. The geometrical distribution of voids is then studied by dividing the void catalogue into two parts - wall voids and non-wall voids. The wall voids are smaller with typical radii of around 150 km s-¹ whereas non-wall voids have a mean radius of approximately 1150 km s-¹. The non-wall, and therefore, the larger voids are distributed isotropically and their correlation function is found to correspond roughly to that of Abell clusters, thus suggesting a link between the two structures. A relation between the velocity dispersions of clusters and the void radii is found using a spherical collapse model for structure formation. The ratio of these two quantities is used to put constraints on the cosmic density parameter 0 and observational data indicate that the universe is open. DA - 1997 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1997 T1 - Southern voids : structure and cosmological implications TI - Southern voids : structure and cosmological implications UR - http://hdl.handle.net/11427/17508 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17508
dc.identifier.vancouvercitationAndersson YLE. Southern voids : structure and cosmological implications. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Astronomy, 1997 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17508en_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.otherAstronomyen_ZA
dc.subject.otherCosmologyen_ZA
dc.titleSouthern voids : structure and cosmological implicationsen_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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