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Ultraviolet spectropolarimetry of the Be star PP Carinae with the Wisconsin Ultraviolet Photo-Polarimeter ExperimentWe present the first ultraviolet spectropolarimetric observations of the Be star PP Car, obtained with the Wisconsin Ultraviolet Photo-Polarimeter Experiment (WUPPE) aboard the Astro 1 mission. Usable polarization data were obtained from 1400 to 2330 A, along with a good spectrum from 1400 to 3200 A. These data show a lower polarization shortward of the Balmer jump than had been predicted by standard models, and a broad UV polarization dip around 1900 A is seen. These results are in agreement with those found from the WUPPE observations of two other Be stars, Xi Tau and Pi Aqr, which were published earlier. All these observations are an important probe of the Be circumstellar envelopes and demonstrate the need for the inclusion of metal-line effects in circumstellar disk models of Be star UV polarization.
Document ID
19930066708
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bjorkman, K. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Meade, M. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Nordsieck, K. H.
(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)
Clayton, G. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Code, A. D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Magalhaes, A. M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schulte-Ladbeck, R. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Taylor, M.
(Wisconsin Univ. Madison, United States)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 412
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A50705
Funding Number(s)
CONTRACT_GRANT: NAS5-26777
Distribution Limits
Public
Copyright
Other

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