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Polarimetry of Be stars at 1.25 and 2.2 microns

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Item Summary

Title: Polarimetry of Be stars at 1.25 and 2.2 microns
Authors: Jones, Terry Jay
Keywords: B stars
Issue Date: 1977
Abstract: Presented are observations of the linear polarization of 8 Be stars at 1.25 and 2.2 microns. An equatorial disk model is developed where the polarization due to electron scattering of stellar and disk radiation is treated discretely, allowing two scatters of the stellar radiation and one of the disk radiation. Neutral hydrogen opacity is taken into account and the populations of the levels of hydrogen are allowed to depart from LTE if the dillute and diffuse fields indicate such a departure is necessary. ϕ Per, ζ Tau, γ Cas, and EW Lac all show a decrease in polarization longward of 1 micron. When combined with polarimetry in the visible model calculations indicate an increase in the density of the disk toward the star for these stars. 48 Lib, ε Cap, and o Aqr all maintain a high polarization into the near-infrared and each requires a different disk structure when modeled. The excess emission longward of 1 micron for these stars can be shown to arise in the disk.
Description: Typescript.
Thesis (Ph. D.)--University of Hawaii at Manoa, 1977.
Bibliography: leaves 95-96.
viii, 96 leaves ill
Rights: All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections:Ph.D. - Astronomy

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