Astronomy and Astrophysics – Astronomy
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.208..381w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 208, May 15, 1984, p. 381-398.
Astronomy and Astrophysics
Astronomy
112
Accretion Disks, Binary Stars, Stellar Models, Stellar Spectra, Variable Stars, Atmospheric Models, Grids, Late Stars, Radiation Sources, Ultraviolet Astronomy, White Dwarf Stars
Scientific paper
Spectra are computed for steady-state models of accretion discs in cataclysmic variables. For each model, spectra are constructed in two ways, by summing Planck functions over the surface of the disc and by summing fluxes from a model atmosphere grid. Large differences exist between the observable properties of corresponding models in the two grids. Neither grid provides a completely satisfactory representation of observed spectra of cataclysmic variables, but the model atmosphere grid exhibits certain advantages, most notably the ability to reproduce the observed power-law ultraviolet continua in a natural way. Mass transfer rates deduced from fitting the atmosphere-type models to the shapes of observed energy distributions will be significantly smaller (often by factors of 10 or 100) than rates deduced from the blackbody models.
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