Hot stars do have a lot of radiation at the wavelengths where wind material has its opacity (the ultraviolet)
The momentum in the light of a hot star (which has a huge luminosity) is, for the O star z Pup:
This can drive a huge wind, potentially:
It is 1010 times the momentum in the solar wind
(ergs s-1) (106 times solar)
(g cm s-2)
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