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The first linear polarization spectra of Wolf-Rayet stars in the ultraviolet - EZ Canis Majoris and Theta MuscaeDuring the 1990 December Astro-1 Space Shuttle mission, spectropolarimetry was conducted in the wavelength region from 1400 to 3200 A of the Wolf-Rayet stars EZ CMa (WN5) and Theta Mus (WC6 + O9.5I) with the Wisconsin Ultraviolet Photo-Polarimeter Experiment. The UV polarization of EZ CMa displays features which correspond to emission lines. This indicates a large, about 0.8 percent, intrinsic UV-continuum polarization, and provides further evidence that the wind of EZ CMa is highly distorted. The polarization of Theta Mus does not change across emission lines, or the strong interstellar 2200 A feature. The polarization decreases smoothly to shorter wavelengths, at constant position angle. The combined UV-optical polarization spectrum of Theta Mus can be described well with interstellar polarization following a Serkowski law.
Document ID
19920055122
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Schulte-Ladbeck, R. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Nordsieck, K. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Code, A. D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Anderson, C. M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Babler, B. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bjorkman, K. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Clayton, G. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Magalhaes, A. M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Meade, M. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shepherd, D. (Wisconsin, University Madison, United States)
Date Acquired
August 15, 2013
Publication Date
May 20, 1992
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 391
Issue: 1 Ma
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A37746
Funding Number(s)
CONTRACT_GRANT: NAS5-26777
Distribution Limits
Public
Copyright
Other

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