Stellar astronomy

Dr. Olgica Kuzmanovska, Professor

Course content:  

• Differential equations of the structure of spherically symmetric stars. Hydrostatic equilibrium equation. Equation of pressure. Analytical models. Polytropic stars. Standard (Eddington) model.

• Sources of stellar energy. Energy transport. Dynamical expansion. Gravitational collapse (Kelvin scale).

• Modeling of the internal structure of stable stars of the main sequence.

• Evolutional time scale. Life on the main sequence. Stellar structure at the beginning of the main sequence.

• Evolution of stars after the main sequence. Thermal instability, gravitational collapse of the helium core and hydrogen reactions in the shell.

• Stable red giant stage. Thermal instability, collapse of the carbon nucleus, reactions of hydrogen and helium in the shell, pulsating instability.

• Late stages of stellar evolution. Degenerative remnants of stars. Planetary nebulae and white dwarfs. Supernovae, neutron stars and black holes. Structure of stellar remnants. Creation of heavy elements in the supernovae processes. Young and old stars.

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