Modeling the EUV spectra of optically thick boundary layers of dwarf novae in outburst

摘要: Here we compute detailed model spectra of recently published optically thick one-dimensional radial baundary layer (BL) models in cataclysmic variables and compare them with observed soft X-ray/extreme ultraviolet (EUV) dwarf novae outburst. Every considered BL is divided into a number rings, for each ring, structure along the vertical direction computed using stellar-atmosphere method. The ring are then combined spectrum taking Doppler broadening limb darkening account. Two sets computed, first consists fixed white (WD) mass (1 M_sun) various relative WD angular velocities (0.2, 0.4, 0.6 0.8 break-up velocities), while other deals velocity (0.8 velocity) masses (0.8, 1, 1.2 M_sun). show broad absorption features because blending numerous lines, emission-like at spectral regions only few strong lines. very similar to X-ray/EUV SS Cyg U Gem could be fitted by - 1 M_sun break up velocities. These also reproduce ratio luminosity disk luminosity. difference between hot thin plasma associated outflowing loss rate compatible accretion rate. suggested method computing seems promising can applied comparison EUV