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On the wind geometry of the Wolf-Rayet star EZ Canis MajorisRecent models of Wolf-Rayet star winds have been tailored to EZ CMa, and make predictions of the envelope structure and location of line-emitting regions. It is discussed how the wind structure of EZ CMa can be probed observationally through electron distribution integrals as measured by spectropolarimetry, and then present, analyze, and interpret a time-dependent spectropolarimetric data set of EZ CMa. The observations further the view of an electron-scattering wind that is axisymmetric, rotating, and expanding, with a variable mass-loss rate being responsible for the quasi-periodic polarimetric variability. It is demonstrated that the emission lines of EZ CMa are partially polarized, indicating that line photons are electron-scattered in the wind. The polarization in N V lambda 4945 and N IV lambda 4058 is observed to be larger than that of He II lambda 4686 and He I lambda 5876, as expected from ionization stratification.
Document ID
19920030882
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Schulte-Ladbeck, R. E.
(Wisconsin Univ. Madison, WI, United States)
Nordsieck, K. H.
(Wisconsin Univ. Madison, WI, United States)
Taylor, M.
(Wisconsin Univ. Madison, WI, United States)
Nook, M. A.
(Wisconsin Univ. Madison, WI, United States)
Bjorkman, K. S.
(Wisconsin Univ. Madison, WI, United States)
Magalhaes, A. M.
(Wisconsin Univ. Madison, WI, United States)
Anderson, C. M.
(Wisconsin, University Madison, United States)
Date Acquired
August 15, 2013
Publication Date
November 20, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 382
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A13506
Funding Number(s)
CONTRACT_GRANT: NAS5-26777
Distribution Limits
Public
Copyright
Other

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