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- W2024665255 abstract "view Abstract Citations (10) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Observations of the Dwarf Nova VW Hydri in Quiescence with the Hopkins Ultraviolet Telescope Long, Knox S. ; Blair, William P. ; Hubeny, Ivan ; Raymond, John C. Abstract The dwarf nova VW Hydri was in quiescence when it was observed in 1995 March with the Hopkins Ultraviolet Telescope on the Astro-2 space shuttle mission. The far-UV (820-1840 Å) spectra are punctuated by broad Lyα and Lyβ absorption profiles and narrow absorption lines which can be identified with transitions expected in the atmosphere of a moderate-temperature white dwarf. There is no detectable emission shortward of 980 Å. The only emission line seen is C IV λλ1548, 1551. If the emission from VW Hyi is due to a uniform-temperature white dwarf; then our spectra suggest that the temperature of the white dwarf was ∼17,000 K at the time of our observations and that abundances in the atmosphere were subsolar. Improved fits to the data are obtained using models in which the far-UV emission arises in part from a white dwarf with near-solar abundances and in part from the accretion disk. However, given the uncertainties in model spectra of metal-enriched atmospheres in this temperature range and our limited knowledge of quiescent accretion disks, higher S/N spectra are needed to unambiguously assess the disk contribution to the far-UV spectrum of VW Hyi in quiescence. Publication: The Astrophysical Journal Pub Date: August 1996 DOI: 10.1086/177567 Bibcode: 1996ApJ...466..964L Keywords: STARS: BINARIES: CLOSE; STARS: INDIVIDUAL CONSTELLATION NAME: VW HYDRI; STARS: NOVAE; CATACLYSMIC VARIABLES; ULTRAVIOLET: STARS full text sources ADS | data products SIMBAD (5) MAST (1)" @default.
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- W2024665255 date "1996-08-01" @default.
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- W2024665255 title "Observations of the Dwarf Nova VW Hydri in Quiescence with the Hopkins Ultraviolet Telescope" @default.
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