Numerical simulations of wind–equatorial gas interaction in η Carinae

摘要: We perform three-dimensional gas-dynamical simulations and show that the asymmetric morphology of blue red-shifted components outflow at hundreds astronomical units (AU) from massive binary system eta Carinae can be accounted for collision free primary stellar wind with slowly expanding dense equatorial gas. Owing to very complicated structure century-old ejecta, is not fully spatially resolved by observations, we limit ourselves modelling gas one or two spherical clouds. Because reproduce general qualitative properties velocity maps, but fine details. The details maps matched simply structuring ejecta in an appropriate way. are formed post-shock flow wind, on sides plane, respectively. fast secondary star plays no role our model, as most orbital period model closer us. clouds observed us than is, so faces majority period.