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 column component considered constant corresponding curve determined deviation diffuse distribution dwarf E. A. MILNE effective temperature elements emission emitted energy-density equation equilibrium ergs excited factor formula free electrons frequency giant stars given gives heat Hence hydrogen increase integral intensity interior ionisation ions k₁ Kramers limit lines luminosity M₁ main series mass material matter mean Milne molecular weight molecules momentum Monthly Notices nebulae nucleus observed obtained opacity orbits P₁ parsecs perfect gas photosphere proportional pulsation quantisation quantum radiation pressure radius range ratio region rotation spectral type spectrum stellar subatomic energy suppose surface T₁ Table terrestrial theory thermodynamical thermodynamical equilibrium tion variables velocity visual magnitude wave-length