Stellar atmospheres

Dr. Olgica Kuzmanovska, Professor

Course content:  

• Basic characteristics of the radiation field.

• Interaction of radiation and matter. Absorption and emission coefficients.

• Approximation of local thermodynamic atmosphere (LTR). Radiative transfer equation. Border conditions. Formal solution of the radiative transfer equation.

• Continuum spectrum. Gray atmosphere approximation. Milne's integral equation. Hoff’s solution. Approximate solutions of the gray problem.

• Absorption coefficient in continuum spectrum. Chemical and physical conditions in stars atmospheres.

• Formation of spectral lines. Characteristics and profiles of spectral lines

• Absorption coefficient in spectral lines. Natural, Doppler and collisional broadening.

• Other mechanisms of spectral line broadening. Basic models of spectral line formation

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