Other
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...19310304o&link_type=abstract
American Astronomical Society, 193rd AAS Meeting, #103.04; Bulletin of the American Astronomical Society, Vol. 30, p.1405
Other
Scientific paper
An extensive grid of synthetic mid- and far-ultraviolet spectra for accretion disks in cataclysmic variables has recently been presented by Wade and Hubeny (1998, ApJ, Vol 510, in press). In those models, the disk was assumed to be in steady-state, that is T_eff(r) is specified completely by the mass M_wd and radius R_wd of the accreting white dwarf star and the mass transfer rate dM/dt which is constant throughout the disk. In these models, T_eff(r) ~ r(-3/4) except as modified by a cutoff term near the white dwarf. Actual disks may vary from the steady-state prescription for T_eff(r), however, e.g. owing to outburst cycles in dwarf novae (dM/dt not constant with radius) or irradiation (in which case T_eff in the outer disk is raised above T_steady). To show how such disks might differ from steady disks, we present a study of models in which power-law temperature profiles T_eff(r) ~ r(-alpha ) with alpha !=q 3/4 are specified. Otherwise, the construction of the models is the same as in the Wade & Hubeny grid, to allow comparison. Both UV spectral energy distributions and appearance of the UV line spectra will be discussed.
Orosz Jerome A.
Wade Richard A.
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