A B-type main-sequence star has effective temperature .
PHYSICS · Multi-part · Fermi University Physics · Astrophysics & Cosmology · Radiation, radiative transfer and stellar atmospheres · Radiation, radiative transfer and stellar atmospheres
Stars from the Inside, Ch Radiative transfer solved: the grey atmosphere, the diffusion limit and the curve of growth
Problem
A B-type main-sequence star has effective temperature Teff=15000K.
((a)) Find the surface temperature T(0) predicted by the grey atmosphere in the Eddington approximation.
((b)) Find the surface temperature predicted by the exact grey solution, for which T(0)=0.811Teff.
((c)) State the percentage by which the Eddington approximation overestimates the exact surface temperature.