Accretion processes in cataclysmic variable stars: insights from optical transient surveys

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dc.contributor.advisorWoudt, Patrick
dc.contributor.advisorBuckley, David
dc.contributor.advisorWarner, Brian
dc.contributor.authorMotsoaledi, Mokhine
dc.date.accessioned2025-03-04T11:13:41Z
dc.date.available2025-03-04T11:13:41Z
dc.date.issued2024
dc.date.updated2025-03-04T11:03:24Z
dc.description.abstractCataclysmic variable (CV) stars are binary stars mostly characterised by accretion from a main sequence donor star to a white dwarf star. Multiple CV subclasses exist with varia tions in the nature of the CV, many of which have accretion discs surrounding the accretor. This study focuses on two sub-classes of CVs, namely AM Canum Venaticorum (AM CVn) stars with helium accretion from a (semi-)degenerate helium star or white dwarf donor star, and magnetic CVs, specifically polars, which have the strongest magnetic fields of the accreting white dwarfs in CVs and lack accretion discs. I make use of optical transient surveys to explore individual objects, as well as the global population of polars, with a focus on the Catalina Real-time Transient Survey (CRTS). Follow-up observations were carried out with the 1-m and 1.9-m telescopes and the 10-m Southern African Large Telescope (SALT) at the South African Astronomical Observatory (SAAO). Observations of 7 outbursting AM CVn stars with orbital periods ranging from
dc.identifier.apacitationMotsoaledi, M. (2024). <i>Accretion processes in cataclysmic variable stars: insights from optical transient surveys</i>. (). University of Cape Town ,Faculty of Science ,Department of Astronomy. Retrieved from http://hdl.handle.net/11427/41096en_ZA
dc.identifier.chicagocitationMotsoaledi, Mokhine. <i>"Accretion processes in cataclysmic variable stars: insights from optical transient surveys."</i> ., University of Cape Town ,Faculty of Science ,Department of Astronomy, 2024. http://hdl.handle.net/11427/41096en_ZA
dc.identifier.citationMotsoaledi, M. 2024. Accretion processes in cataclysmic variable stars: insights from optical transient surveys. . University of Cape Town ,Faculty of Science ,Department of Astronomy. http://hdl.handle.net/11427/41096en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Motsoaledi, Mokhine AB - Cataclysmic variable (CV) stars are binary stars mostly characterised by accretion from a main sequence donor star to a white dwarf star. Multiple CV subclasses exist with varia tions in the nature of the CV, many of which have accretion discs surrounding the accretor. This study focuses on two sub-classes of CVs, namely AM Canum Venaticorum (AM CVn) stars with helium accretion from a (semi-)degenerate helium star or white dwarf donor star, and magnetic CVs, specifically polars, which have the strongest magnetic fields of the accreting white dwarfs in CVs and lack accretion discs. I make use of optical transient surveys to explore individual objects, as well as the global population of polars, with a focus on the Catalina Real-time Transient Survey (CRTS). Follow-up observations were carried out with the 1-m and 1.9-m telescopes and the 10-m Southern African Large Telescope (SALT) at the South African Astronomical Observatory (SAAO). Observations of 7 outbursting AM CVn stars with orbital periods ranging from DA - 2024 DB - OpenUCT DP - University of Cape Town KW - optical transient surveys LK - https://open.uct.ac.za PB - University of Cape Town PY - 2024 T1 - Accretion processes in cataclysmic variable stars: insights from optical transient surveys TI - Accretion processes in cataclysmic variable stars: insights from optical transient surveys UR - http://hdl.handle.net/11427/41096 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/41096
dc.identifier.vancouvercitationMotsoaledi M. Accretion processes in cataclysmic variable stars: insights from optical transient surveys. []. University of Cape Town ,Faculty of Science ,Department of Astronomy, 2024 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/41096en_ZA
dc.language.isoen
dc.language.rfc3066eng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.publisher.institutionUniversity of Cape Town
dc.subjectoptical transient surveys
dc.titleAccretion processes in cataclysmic variable stars: insights from optical transient surveys
dc.typeThesis / Dissertation
dc.type.qualificationlevelDoctoral
dc.type.qualificationlevelPhD
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