Models of Achernar : evolution and atmospheres of a rapidly rotating B star

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dc.contributor.advisor Deupree, Robert G. (Robert Gaston), 1946-
dc.creator Lovekin, Catherine
dc.date.accessioned 2011-05-09T12:32:02Z
dc.date.available 2011-05-09T12:32:02Z
dc.date.issued 2005
dc.identifier.other QB843 B12 L68 2005
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/22415
dc.description [ix], 70 leaves : ill. ; 28 cm.
dc.description Includes abstract.
dc.description Includes bibliographical references (leaves 66-70).
dc.description.abstract I investigate the effects of varying internal angular momentum distributions on the SEDs of massive stars. Rapidly rotating stars are deformed by rotation, and the degree of deformation can give us a further constraint on stellar evolution models, possibly allowing us to constrain the internal angular momentum distribution of these stars. I have modelled three different internal angular momentum distributions: uniform rotation and two different power law distributions. I use a fully implicit 2D stellar evolution code to determine the variation in surface properties exactly. The variation in surface properties of these evolutionary models are then used as the input for atmospheric modelling. I have made a grid of atmospheric intensities at values of T eff and log g , which I then use to interpolate the intensities in the direction of the observer over the surface of the star to produce a synthetic spectral energy distribution. I have used Achernar as a test case for this modelling.
dc.language.iso en
dc.publisher Halifax, N.S. : Saint Mary's University
dc.subject.lcc QB843.B12
dc.subject.lcsh B stars
dc.subject.lcsh Stars -- Evolution -- Mathematical models
dc.subject.lcsh Stars -- Atmospheres -- Mathematical models
dc.subject.lcsh Stars -- Rotation
dc.subject.lcsh Spectral energy distribution
dc.subject.lcsh Angular momentum (Nuclear physics)
dc.title Models of Achernar : evolution and atmospheres of a rapidly rotating B star
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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