The structure of the large magellanic cloud

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dc.contributor.advisorFeast, Michael
dc.contributor.advisorWhitelock, Patricia
dc.contributor.authorAbedigamba_OP, Oyirwoth
dc.date.accessioned2024-08-29T11:44:02Z
dc.date.available2024-08-29T11:44:02Z
dc.date.issued2010
dc.date.updated2024-08-29T11:38:45Z
dc.description.abstractThis work gives an account of the study of the metallicity [Fe/H] distribution (gradient) in the oldest population in the Large Magellanic Cloud (LMC), by making use of the available RR Lyrae data from the Optical Gravitational Lensing Experiment III (OGLE III). RR Lyrae stars are amongst the oldest objects in the universe and they have a range in element (metal) abundances. Measuring the distribution of metallicities of RR Lyrae stars in a galaxy gives one clues to the origin of galaxies. It is known that the pulsation periods of RR Lyraes is broadly correlated with their metallicity. This fact has been used for investigating the metallicity distribution of RR Lyrae stars in the LMC. I have found an indication that the proportion of metal poor RR Lyrae stars increases with distance from the centre of the LMC. In addition, an attempt was made to improve the metallicity-period relation by introducing the Fourier parameters, but this was unsuccessful. Lastly, a comparison is made with estimates of metallicity gradients of other LMC populations.
dc.identifier.apacitationAbedigamba_OP, O. (2010). <i>The structure of the large magellanic cloud</i>. (). University of Cape Town ,Faculty of Science ,Department of Astronomy. Retrieved from http://hdl.handle.net/11427/40533en_ZA
dc.identifier.chicagocitationAbedigamba_OP, Oyirwoth. <i>"The structure of the large magellanic cloud."</i> ., University of Cape Town ,Faculty of Science ,Department of Astronomy, 2010. http://hdl.handle.net/11427/40533en_ZA
dc.identifier.citationAbedigamba_OP, O. 2010. The structure of the large magellanic cloud. . University of Cape Town ,Faculty of Science ,Department of Astronomy. http://hdl.handle.net/11427/40533en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Abedigamba_OP, Oyirwoth AB - This work gives an account of the study of the metallicity [Fe/H] distribution (gradient) in the oldest population in the Large Magellanic Cloud (LMC), by making use of the available RR Lyrae data from the Optical Gravitational Lensing Experiment III (OGLE III). RR Lyrae stars are amongst the oldest objects in the universe and they have a range in element (metal) abundances. Measuring the distribution of metallicities of RR Lyrae stars in a galaxy gives one clues to the origin of galaxies. It is known that the pulsation periods of RR Lyraes is broadly correlated with their metallicity. This fact has been used for investigating the metallicity distribution of RR Lyrae stars in the LMC. I have found an indication that the proportion of metal poor RR Lyrae stars increases with distance from the centre of the LMC. In addition, an attempt was made to improve the metallicity-period relation by introducing the Fourier parameters, but this was unsuccessful. Lastly, a comparison is made with estimates of metallicity gradients of other LMC populations. DA - 2010 DB - OpenUCT DP - University of Cape Town KW - Astronomy; Large Magellanic Cloud; RR Lyrae stars; Optical Gravitational Lensing Experiment; Fourier parameters; metallicity [Fe/H] LK - https://open.uct.ac.za PB - University of Cape Town PY - 2010 T1 - The structure of the large magellanic cloud TI - The structure of the large magellanic cloud UR - http://hdl.handle.net/11427/40533 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/40533
dc.identifier.vancouvercitationAbedigamba_OP O. The structure of the large magellanic cloud. []. University of Cape Town ,Faculty of Science ,Department of Astronomy, 2010 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/40533en_ZA
dc.language.isoen
dc.language.rfc3066Eng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.publisher.institutionUniversity of Cape Town
dc.subjectAstronomy; Large Magellanic Cloud; RR Lyrae stars; Optical Gravitational Lensing Experiment; Fourier parameters; metallicity [Fe/H]
dc.titleThe structure of the large magellanic cloud
dc.typeThesis / Dissertation
dc.type.qualificationlevelMasters
dc.type.qualificationlevelMasters
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