Stars range in (surface) temperature from about 3500 K to 50,000 K
Their temperatures correlate with mass and luminosity (massive stars are hot and very bright): a 50,000
K star gives of a
million times the luminosity of the Sun (Tsun = 6000 K)
Stars hotter than about 8000 do not have convective outer layers - no convection - no dynamo - no hot
corona…
…no
X-rays