METUJE wind models of OB stars at Z<=0.1Zo

The models were calculated with our global wind code METUJE, which solves the hydrodynamical equations from nearly hydrostatic photosphere to supersonically expanding stellar wind together with the equations of statistical equilibrium and radiative transfer equation. The models predict the basic wind parameters, namely the wind mass-loss rates and terminal velocities just from the stellar parameters.

In general, the wind mass-loss rates decrease with decreasing metallicity and this relationship steepens for very low metallicities Z<0.1Zo. Down to metallicities corresponding to the Magellanic Clouds and even lower, the predicted mass-loss rates reasonably agree with observational estimates. However, the theoretical and observational mass-loss rates for very low metallicities exhibit significant scatter.