Modelling the atmospheres and SEDs of RCB stars and Sakurai's Object

Yakiv Pavlenko, Main Astronomical Observatory, Golosiiv Woods, 03680 Kyiv-127, Ukraine

Procedures and results of computations of model atmospheres and spectral energy distributions (SED) of V4334 Sgr and related objects are discussed. An impact of the input physics parameters - $T_{\rm eff}$, $\log\,\,g$, abundances, opacity and convection interpretations on model atmospheres and SEDs is considered. We show that a sequence of SEDs computed for our grids of model atmospheres of $4000 < T_{\rm eff}\mbox{(K)} < 7000$ and $0 < \log g < 1.0$ provides a unique possibility of the analysis of temporary changes of physical parameters of V4334 Sgr and related objects in the frame of the self-consistent approach.

Results of comparisons of model atmospheres computed by different authors are discussed.