A Far Ultraviolet Archival Study of Cataclysmic Variables: I. FUSE and HST/STIS Spectra of the Exposed White Dwarf in Dwarf Nova Systems

Abstract

We present a synthetic spectral analysis of Far Ultraviolet Spectroscopic Explorer (FUSE) and Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS) spectra of 5 dwarf novae above and below the period gap during quiescence. We use our synthetic spectral code, including options for the treatment of the hydrogen quasi-molecular satellite lines (for low temperature stellar atmospheres), NLTE approximation (for high temperature stellar atmospheres), and for one system (RU Peg) we model the interstellar medium (ISM) molecular and atomic hydrogen lines. In all the systems presented here the FUV flux continuum is due to the WD. These spectra also exhibit some broad emission lines. In this work we confirm some of the previous FUV analysis results but we also present new results. For 4 systems we combine the FUSE and STIS spectra to cover a larger wavelength range and to improve the spectral fit. This work is part of our broader HST archival research program, in which we aim to provide accurate system parameters for cataclysmic variables above and below the period gap by combining FUSE and HST FUV spectra.

49 pages (preprint format), 11 figures, 6 tables, ApJ in press

References in corpus (4)

• HST/STIS Spectroscopy and Modeling of the Long Term Cooling of WZ Sagittae following the July 2001 Outburst
• The Dwarf Novae During Quiescence
• A Far Ultraviolet Study of the Hot White Dwarf in the Dwarf Nova WW Ceti
• Synthetic NLTE accretion disc spectra for the dwarf nova SS Cyg during an outburst cycle

Cited by in corpus (9)

• Modifying the Standard Disk Model for the Ultraviolet Spectral Analysis of Disk-dominated Cataclysmic Variables. I. The Novalikes MV Lyrae, BZ Camelopardalis, and V592 Cassiopeiae
• Combined Chandra, XMM-Newton and Hubble Space Telescope observations of the Galactic globular cluster NGC 2808
• A Systematic X-ray Study of the Dwarf Novae Observed with Suzaku
• Nova-produced Common Envelope: Source of the Non-solar Abundances and an Additional Frictional Angular Momentum Loss in Cataclysmic Variables
• A Far Ultraviolet Spectroscopic Explorer Survey of High Declination Dwarf Novae
• Far Ultraviolet Spectroscopic Explorer Spectroscopy of the Nova-like BB Doradus
• White Dwarf Photospheric Abundances in Cataclysmic Variables: I. SS Aurigae and TU Mensae
• The C/N ratio from FUV spectroscopy as a constraint upon the past evolution of HS0218+3229
• The activity of the dwarf nova RU Pegasi with rapidly changing outburst types