Time
dependent models of the winds show lots of structure: turbulence,
shock waves, collisions between “clouds”
This
chaotic behavior is predicted to produce X-rays through shock-heating
of some small fraction of the wind.
The
wind structure - and associated shock heating - is
generated by the line-force instability, which relies
on Doppler deshadowing of radiatively-driven ions to increase
the radiative driving in an exponentially growing feedback
process.