An Atlas of the Lyman-alpha Region for a Grid of Dwarf Nova Accretion Disk Models

Details An Atlas of the Lyman-alpha Region for a Grid of Dwarf Nova Accretion Disk Models An Atlas of the Lyman-alpha Region for a Grid of Dwarf Nova Accretion Disk Models

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.6312w&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #63.12; Bulletin of the American Astronomical Society, Vol. 25, p.910

Astronomy and Astrophysics

Astronomy

Scientific paper

We use the accretion disk modeling code TLUSDISK and spectrum synthesis tools to compute a grid of spectra between 900 and 1500 Angstroms for accretion disks of cataclysmic variables in quiescence. The disk models and spectra are calculated in LTE. A contribution from the white dwarf is included, for a variety of white dwarf effective temperatures. The occultation of part of the inner disk by the white dwarf is also taken into account. The contribution of a boundary layer, assumed to be optically thin and emitting primarily at x-ray temperatures, is neglected. The mass and radius of the accreting white dwarf are varied. The mass accretion rate, assumed to be steady, is chosen to reproduce the estimated luminosities of quiescent dwarf novae. The emergent spectra are presented for a variety of inclination angles, to show the effect of Doppler broadening at a resolution similar to that of the Hopkins Ultraviolet Telescope and somewhat better than that of low-dispersion IUE spectra. Comparisons of the Lyman-alpha region with some IUE spectra of dwarf novae in quiescence are attempted. Supported by NASA grant NAG 5-2125.

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