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J. B. Holberg (LPL, Univ. of Ariz.), M.A. Barstow, M.R. Burleigh (Univ. of Leicester), J.W. Kruk (Johns Hopkins Univ.), I. Hubeny (Steward Obs. Univ. of Ariz), D. Koester (Kiel, Univ.)
Observations of the white dwarf Sirius B, obtained in the far ultraviolet with the Far Ultraviolet Spectroscopic Explorer Satellite (FUSE), reveal the Lyman line region of Sirius B free from significant photometric contamination from Sirius A. The FUSE spectra provide a new estimate of the white dwarf gravitational redshift based on the Lyman lines, as well as Lyman line-based determination of the surface gravity, and an estimate of the absolute flux from the white dwarf in the FUV. Sirius B is seen to possess strong quasi-molecular Lyman line features associated with the Lyman Beta and Lyman Gamma lines. No spectroscopic features due to any elements other than hydrogen are found in the Sirius B photosphere.
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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.