RADIATION HYDRODYNAMIC MODELS OF ECLIPSING LOW-MASS X-RAY BINARIES

We present the results of self-consistent two-dimensional radiation hy drodynamic models of winds and coronae above accretion disks in low-ma ss X-ray binaries. The numerical method combines adaptive mesh refinem ent for the hydrodynamics with combined ray tracking/flux-limited diff usion for the radiation. The results of the models are compared with E XOSAT observations of X1822-371 and 2S 0921-630, two eclipsing systems that are ideal for direct tests of coronal structure. Excellent fits to the eclipses by the companion star are found for models with intrin sic system luminosities approximate to 0.1L(Edd). Estimates are made o f the equivalent width of the Fe K alpha emission, and values in the r ange 50-200 eV are found, comparable to estimates from recent observat ions.