Asteroseismology of intermediate mass stars : pre-main sequence evolution

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dc.contributor.advisor Guenther, David B.
dc.creator Tanner, Joel
dc.date.accessioned 2011-05-09T12:31:32Z
dc.date.available 2011-05-09T12:31:32Z
dc.date.issued 2007
dc.identifier.other QB812 T36 2007
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/22143
dc.description xiv, 130 leaves : ill. ; 29 cm.
dc.description Includes abstract.
dc.description Includes bibliographical references (leaves 126-130).
dc.description.abstract We investigate in detail the potential of asteroseismology in exploring the structure of intermediate mass (1.6 &#8804 M<sub>&#8857</sub> &#8804 5.0) pre-main sequence stars. It is expected that pre- and post-main sequence stars will produce differing oscillation spectra due to the dependance of oscillation frequencies on the internal structure of that star. We compute densely populated grids of pre- and post-main sequence stellar models, which are then used as a tool to explore the oscillation frequencies of pre-main sequence stars. We examine the cause of the oscillation spectra by correlating the frequencies with changes in stellar structure and comparing fundamental properties of pre-main sequence stars to their post-main sequence counterparts. By fashioning a set of oscillation frequencies designed to mimic observed oscillation spectra, we determine the conditions under which we can distinguish the evolutionary state of a star through its oscillation spectra alone, and explore our ability to constrain stellar parameters as a function of the quality of the observed frequency spectrum. Using the dense grids to construct precise pre-main sequence isochrones, we fit them to two young open clusters. Finally, we present efforts in constraining the stellar parameters of two pre-main sequence stars by matching the observed frequencies to the calculated frequency spectra of all grid models.
dc.description.provenance Made available in DSpace on 2011-05-09T12:31:32Z (GMT). No. of bitstreams: 0 en
dc.language.iso en
dc.publisher Halifax, N.S. : Saint Mary's University
dc.subject.lcc QB812
dc.subject.lcsh Astroseismology
dc.subject.lcsh Stellar oscillations
dc.subject.lcsh Stars -- Evolution
dc.title Asteroseismology of intermediate mass stars : pre-main sequence evolution
dc.type Text
thesis.degree.name Master of Science in Astronomy
thesis.degree.level Masters
thesis.degree.discipline Astronomy and Physics
thesis.degree.grantor Saint Mary's University (Halifax, N.S.)
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