Open clusters and HII regions of our Galaxy

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dc.contributor.advisorMcBride, Vanessaen_ZA
dc.contributor.authorObonyo, Willice Odhiamboen_ZA
dc.date.accessioned2016-06-10T07:38:31Z
dc.date.available2016-06-10T07:38:31Z
dc.date.issued2015en_ZA
dc.description.abstractOpen clusters are essential laboratories for understanding stellar evolution, as they allow constraints to be placed on stellar ages and luminosities. As distance indicators they are also important tracers of star formation in the Milky Way. One such cluster is Trumpler 27 that we identified for detailed study.The aim of the study is to estimate the distance, radial velocity, age, membership and reddening of the cluster using both spectroscopic and photometric techniques. We used new spectroscopic data collected from SAAO's 1.9m telescope together with existing photometric data from catalogues in the study of Trumpler 27. The spectra collected were classified using spectral atlases to determine the reddening in the field. Stars of the cluster were identified using selection techniques that made use of both infrared and optical Q parameters, spatial distribution and photometric techniques. The result from this work suggest that Trumpler 27 is made up of ~ 55 stars which are at different stages of evolution. The stars include main sequence stars, blue supergiants, two cool supergiants and maybe two WR stars.en_ZA
dc.identifier.apacitationObonyo, W. O. (2015). <i>Open clusters and HII regions of our Galaxy</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Astronomy. Retrieved from http://hdl.handle.net/11427/19997en_ZA
dc.identifier.chicagocitationObonyo, Willice Odhiambo. <i>"Open clusters and HII regions of our Galaxy."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Astronomy, 2015. http://hdl.handle.net/11427/19997en_ZA
dc.identifier.citationObonyo, W. 2015. Open clusters and HII regions of our Galaxy. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Obonyo, Willice Odhiambo AB - Open clusters are essential laboratories for understanding stellar evolution, as they allow constraints to be placed on stellar ages and luminosities. As distance indicators they are also important tracers of star formation in the Milky Way. One such cluster is Trumpler 27 that we identified for detailed study.The aim of the study is to estimate the distance, radial velocity, age, membership and reddening of the cluster using both spectroscopic and photometric techniques. We used new spectroscopic data collected from SAAO's 1.9m telescope together with existing photometric data from catalogues in the study of Trumpler 27. The spectra collected were classified using spectral atlases to determine the reddening in the field. Stars of the cluster were identified using selection techniques that made use of both infrared and optical Q parameters, spatial distribution and photometric techniques. The result from this work suggest that Trumpler 27 is made up of ~ 55 stars which are at different stages of evolution. The stars include main sequence stars, blue supergiants, two cool supergiants and maybe two WR stars. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Open clusters and HII regions of our Galaxy TI - Open clusters and HII regions of our Galaxy UR - http://hdl.handle.net/11427/19997 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/19997
dc.identifier.vancouvercitationObonyo WO. Open clusters and HII regions of our Galaxy. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Astronomy, 2015 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19997en_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.otherAstrophysics and Space Scienceen_ZA
dc.titleOpen clusters and HII regions of our Galaxyen_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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