The goal of this course is to provide the students with a general overview of stellar physics. Starting from the fundamental properties of stars as inferred from observation (photometry, spectroscopy, parallax, mass measurements in binary systems), the features of physical stellar models are introduced. These include the equations of stellar equilibrium, energy production, stellar evolution. Along the path, some of the fundamental physical quantities and concepts of astrophysics are introduced, which will be a basis for the course Astronomy II and for other courses in the astrophysics curriculum.
Expected learning outcomes
Students at the end of the course are expected to reach the following capabilities: 1. to correctly use basic quantities and concepts, such as luminosity and magnitude (relative and absolute), surface brightness, flux density, effective temperature, luminosity radius, etc. 2. to describe the main properties of a stellar spectrum, continuous radiation and absorption lines 3. to calculate relative velocities of astrophysical sources from Doppler effect measurements, and to evaluate the effects of temperature and pressure from the shape of absorption line profiles 4. to be able to discuss the main properties of the Sun, its structure, cycle, magnetic activity, the characteristics of the photosphere, chromosphere, corona 5. to gain familiarity with the mechanisms of nuclear energy production in stars, including the information of solar interior from helioseismology and neutrino physics 6. to gain familiarity with the equations of stellar equilibrium, af the mechanisms of radiative and convective energy transfer in the interior of stars 7. to be able to discuss stellar evolution for stars of different mass ranges, including their final stages 8. to be able to discuss the properties of degenerate gas, the nature of white dwarfs and neutron stars, the conditions for the formation of a stellar black hole 9. to be able to calculate astronomical distances from observations of stellar properties, including measurements of trigonometric parallax, spectroscopic parallax, measurement of Cepheid variables, Supernovae Type Ia