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	Graduate Courses
	- Course schedules - 622: Interstellar medium - 623: Interiors & evolution - 626: Galaxies - 627: Cosmology - 630: Solar system - 631: Radiative transfer - 633: Techniques - 635: Astrophysics - 640: General relativity - 641: Active galaxies - 657: Astrochemistry - 699: Directed research - 700: MS thesis - 73x: Seminars - 740: Astrobiology - 777: Star formation - 800: PhD dissertation

Modified by JEB on May 30, 2007

Astronomy 631: Radiative Transfer and Stellar Atmospheres

Radiation field: definitons, energy density, radiation pressure.
Equation of transfer: interaction of radiation and matter, transfer equation, angular moments, radiative equilibrium, diffusion approximation
Grey atmosphere problem, definition, mean opacities. approximate solutions,
LTE equation of state
Absorption cross section: Einstein coefficients, continuous absorption and scattering processes
Solution of the transfer equation:

LTE model atmosphere: assumptions, boundary value problem
Statistical equilibrium: requirements for LTE, non-LTE rate equations
Non-LTE model atmosphere for early-type stars
Line formation:observable quantities, line profiles, Voigt function
Classical treatment of line formation: Milne-Eddington model, curve of growth, LTE spectrum synthesis
Non-LTE line formation: two level atom with and without continuum, multilevel atoms.

This outline is representative only, and is likely to change from instructor to instructor and from year to year.

Recent instructors