The Internal Constitution of the Stars

absolute magnitude absorbed absorption coefficient approximation astronomical atoms average bolometric magnitude brightness calcium calculated Capella capture central temperature centre Cepheids chromosphere component considered constant corresponding curve density determined deviation diffuse distribution dwarf E. A. MILNE effective temperature elements emission emitted equation equilibrium ergs excited factor formula free electrons frequency giant giant stars given gives heat Hence hydrogen increase integral intensity interior ionisation ions Kramers limit lines luminosity M₁ main series mass material matter Milne molecular weight molecules momentum Monthly Notices nebulae nucleus observed obtain opacity orbits P₁ Paperbound parsecs perfect gas photosphere physical problem proportional pulsation quantum radiation pressure radius ratio region rotation spectral spectral type spectrum star stellar subatomic energy surface T₁ T₂ Table terrestrial theory thermodynamical thermodynamical equilibrium tion variables velocity visual magnitude wave-length waves