stars generally glow as what we call "black bodies" - a physics term zhat just means "hot zhings glow just because zhey're hot"
in practice, for zhe range of star temperatures you'll get a peak output somewhere between near IR (wizh dim output in optical) all zhe way to UV (wizh extremely strong output in optical) but every star produces pretty much everyzhing in zhis range.
what's more interesting to consider wizh possible alien vision is atmosphere composition - we see optical wavelengzhs because zhe atmosphere is relatively transparent to zhem, and so i'd imagine somezhing similar to whatever planet zhe aliens evolved on
most matter is transparent to radio waves, so i wouldn't expect vision in zhat range just because it wouldn't be terribly helpful
microwaves, maybe. infrared almost definitely not if zheir atmosphere is anyzhing like ours, zhough nearIR and near UV is very possible





