Polarimetry of Be stars at 1.25 and 2.2 microns

dc.contributor.author Jones, Terry Jay en_US
dc.date.accessioned 2009-07-15T17:14:20Z
dc.date.available 2009-07-15T17:14:20Z
dc.date.issued 1977 en_US
dc.description Typescript. en_US
dc.description Thesis (Ph. D.)--University of Hawaii at Manoa, 1977. en_US
dc.description Bibliography: leaves 95-96. en_US
dc.description Microfiche. en_US
dc.description viii, 96 leaves ill en_US
dc.description.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. en_US
dc.identifier.uri http://hdl.handle.net/10125/9339
dc.language.iso en-US en_US
dc.relation Theses for the degree of Doctor of Philosophy (University of Hawaii at Manoa). Astronomy; no. 1054 en_US
dc.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. en_US
dc.subject B stars en_US
dc.title Polarimetry of Be stars at 1.25 and 2.2 microns en_US
dc.type Thesis en_US
dc.type.dcmi Text en_US