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Anomalous Ultraviolet Line Flux Ratios in the Cataclysmic Variables 1RXS J232953.9+062814, CE 315, BZ Ursae Majoris, and EY Cygni, Observed with theHubble Space TelescopeSpace Telescope Imaging Spectrograph

2003/05/15 by B. T. Gänsicke, Boris T. Gänsicke, Paula Szkody +12 · 121 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Cataclysmic variable star #Gamma-ray bursts and supernovae #Hubble Deep Field #Hubble space telescope #Physics #Population #Pulsars and Gravitational Waves Research #Space Telescope Imaging Spectrograph #Spitzer Space Telescope #Stars #Telescope #White dwarf #astro-ph

paper · pdf · doi:10.1086/376902

published in The Astrophysical Journal 594(1), 443-448 (IOP Publishing) · 6 pages AAS-Latex, uses emulatapj.sty, 3 figures, accepted for publication in ApJ

arxiv created 2003/05/15 · openalex publication_date 2003/08/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Brief Hubble Space Telescope Space Telescope Imaging Spectrograph spectroscopic snapshot exposures of the cataclysmic variables 1RXS J232953.9+062814, CE 315, BZ UMa, and EY Cyg reveal very large N V/C IV line flux ratios, similar to those observed in AE Aqr. Such anomalous line flux ratios have so far been observed in 10 systems and presumably reflect a different composition of the accreted material compared to the majority of cataclysmic variables. We discuss the properties of this small sample in the context of the recent proposal by Schenker et al. that a significant fraction of the present-day population of cataclysmic variables may have passed through a phase of thermal timescale mass transfer.

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