The morphology and absolute diameters of galaxies

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dc.contributor.advisorFairall, Anthony Patricken_ZA
dc.contributor.authorBlock, David Lazaren_ZA
dc.date.accessioned2015-02-24T04:14:35Z
dc.date.available2015-02-24T04:14:35Z
dc.date.issued1980en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThis is the first time to the author's knowledge that a catalogue of galaxy photographs has been prepared on a uniform physical scale. Of the many interesting aspects which result from such an investigation, we mention here the fundamentally new appreciation both of the diversity of spiral arm texture, and in the range of the intrinsic diameters of galaxies, particularly the spirals. Small, high surface brightness spiral galaxies form an important subgroup; these present a saturated or predominantly saturated image on the SRC IIIa-J Survey. An intercomparison of their appearance on the J-film copies and those of the "Quick Blue" Survey shows an inner morphology often indicative of substantial differential rotation effects. One of our galaxies in the sample shows significant signs of warping; the spiral has no bright, close companions. Also of note are faint, featureless outer envelopes in some of the spirals, and galaxies with faint outer spiral arms whose pitch angles are significantly different from those of the central inner region. Further results are discussed in chapter 3 onwards. A by-product of this investigation is the identification of the largest known (type b) barred spiral.en_ZA
dc.identifier.apacitationBlock, D. L. (1980). <i>The morphology and absolute diameters of galaxies</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Astronomy. Retrieved from http://hdl.handle.net/11427/12539en_ZA
dc.identifier.chicagocitationBlock, David Lazar. <i>"The morphology and absolute diameters of galaxies."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Astronomy, 1980. http://hdl.handle.net/11427/12539en_ZA
dc.identifier.citationBlock, D. 1980. The morphology and absolute diameters of galaxies. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Block, David Lazar AB - This is the first time to the author's knowledge that a catalogue of galaxy photographs has been prepared on a uniform physical scale. Of the many interesting aspects which result from such an investigation, we mention here the fundamentally new appreciation both of the diversity of spiral arm texture, and in the range of the intrinsic diameters of galaxies, particularly the spirals. Small, high surface brightness spiral galaxies form an important subgroup; these present a saturated or predominantly saturated image on the SRC IIIa-J Survey. An intercomparison of their appearance on the J-film copies and those of the "Quick Blue" Survey shows an inner morphology often indicative of substantial differential rotation effects. One of our galaxies in the sample shows significant signs of warping; the spiral has no bright, close companions. Also of note are faint, featureless outer envelopes in some of the spirals, and galaxies with faint outer spiral arms whose pitch angles are significantly different from those of the central inner region. Further results are discussed in chapter 3 onwards. A by-product of this investigation is the identification of the largest known (type b) barred spiral. DA - 1980 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1980 T1 - The morphology and absolute diameters of galaxies TI - The morphology and absolute diameters of galaxies UR - http://hdl.handle.net/11427/12539 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/12539
dc.identifier.vancouvercitationBlock DL. The morphology and absolute diameters of galaxies. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Astronomy, 1980 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/12539en_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.titleThe morphology and absolute diameters of galaxiesen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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