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dc.contributor.advisorHolberg, Jayen
dc.contributor.authorCamarota, Lawrence Francis
dc.creatorCamarota, Lawrence Francisen
dc.date.accessioned2017-08-25T15:02:14Z
dc.date.available2017-08-25T15:02:14Z
dc.date.issued2017
dc.identifier.urihttp://hdl.handle.net/10150/625365
dc.description.abstractThis dissertation explores the non-Doppler shifting of Helium lines in the high pressure conditions of a white dwarf photosphere. In particular, this dissertation seeks to mathematically quantify the shift in a way that is simple to reproduce and account for in future studies without requiring prior knowledge of the star’s bulk properties (mass, radius, temperature, etc.). Two main methods will be used in this analysis. First, the spectral line will be quantified with a continuous wavelet transformation, and the components will be used in a χ^2 minimizing linear regression to predict the shift. Second, the position of the lines will be calculated using a best-fit Levy-alpha line function. These techniques stand in contrast to traditional methods of quantifying the center of often broad spectral lines, which usually assume symmetry on the parts of the lines.
dc.language.isoen_USen
dc.publisherThe University of Arizona.en
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en
dc.subjectSpectroscopyen
dc.subjectWaveleten
dc.subjectWhite Dwarfen
dc.titleDetermining the Pressure Shift of Helium I Lines Using White Dwarf Starsen_US
dc.typetexten
dc.typeElectronic Dissertationen
thesis.degree.grantorUniversity of Arizonaen
thesis.degree.leveldoctoralen
dc.contributor.committeememberHolberg, Jayen
dc.contributor.committeememberVisscher, Koenen
dc.contributor.committeememberJons, Kennethen
dc.contributor.committeememberSandhu, Arvinderen
dc.contributor.committeememberHubeny, Ivanen
thesis.degree.disciplineGraduate Collegeen
thesis.degree.disciplinePhysicsen
thesis.degree.namePh.D.en
refterms.dateFOA2018-04-26T13:29:15Z
html.description.abstractThis dissertation explores the non-Doppler shifting of Helium lines in the high pressure conditions of a white dwarf photosphere. In particular, this dissertation seeks to mathematically quantify the shift in a way that is simple to reproduce and account for in future studies without requiring prior knowledge of the star’s bulk properties (mass, radius, temperature, etc.). Two main methods will be used in this analysis. First, the spectral line will be quantified with a continuous wavelet transformation, and the components will be used in a χ^2 minimizing linear regression to predict the shift. Second, the position of the lines will be calculated using a best-fit Levy-alpha line function. These techniques stand in contrast to traditional methods of quantifying the center of often broad spectral lines, which usually assume symmetry on the parts of the lines.


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