Abstract
We present Extreme Ultraviolet Explorer (EUVE) and optical spectra of the DAO member of the close binary EUVE J0720-317 and of the hot DA EUVE J0723-277. A comparison of density measurements of the local interstellar medium (ISM) toward EUVE J0720-317 and EUVE J0723277 (only 4° apart) reveals large variations in ISM ionization properties. We speculate that the line of sight toward the close binary EUVE J0720-317 is contaminated with circumbinary material or by unsuspected structures in the local ISM.
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© 1997 Springer Science+Business Media Dordrecht
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Dupuis, J., Vennes, S., Bowyer, S. (1997). Extreme Ultraviolet Spectroscopy of EUVE J0720-317 and EUVE J0723-277. In: Isern, J., Hernanz, M., García-Berro, E. (eds) White Dwarfs. Astrophysics and Space Science Library, vol 214. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5542-7_40
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DOI: https://doi.org/10.1007/978-94-011-5542-7_40
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6334-0
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