Absorption and Emission of Radiation 5. Quantum Mechanical Analysis 6. Looking for beautiful books? Classical Analysis 6. Unsourced material may be challenged and removed. Hubeny and Mihalas constitute the dream team for this subject, having worked in the area for their entire careers and made fundamental and important contributions.
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Spectral and luminosity classification. Relation of theory and observation. Elements of Radiative Transfer Theory: Definitions. Emission, absorption, and scattering. Equation of transfer, radiative equilibrium. Two-stream and Eddington approximations. Emergent flux and limb darkening. Perfect gases and the Saha equation. Conditions for LTE.
Depression of the adiabatic gradient in a partial ionization zone. Radiative and collisional rates; departure coefficients. Calculation of Einstein coefficients and collision cross-sections. Continuum Opacity: Opacity sources in high-, intermediate-, and low-temperature stellar atmospheres. Temperature-correction procedures. Results and Comparison With Observations: Absolute energy distributions. The Balmer jump. Sample model atmosphere calculation.
Flux distributions for sample model stars. Effect of absorption edges on atmospheric structure, line-blanketing, molecule formation. Mixing Length Theory: Convection and partial ionization zones. Simple phenomenological models. Line Spectra: Line absorption profiles. Natural broadening and the Lorentz profile. Doppler broadening and the Voigt profile. Collisional broadening. Stark broadening, Inglis Teller formula. Line Transfer Problem. Center-to-limb variations. Schuster mechanisms. Curve of growth and abundance determinations.
Model atmosphere line calculations. Line blanketing theory, LTE line formation. Development of a first-principles approach to the problem. Applications to Hot stars.
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