Stellar Atmospheres


an advanced course (10 credits)

at the Astronomy research unit, University of Oulu

The course period: September 4 – December 20, 2019

Lectures, exercise and practical sessions take place usually on Wednesday at 14-16 and Friday at 12-14, see WebOODI for detail.

The course is lectured in English

Teacher: Vitaly Neustroev, MA 302, vitaly[-at-]neustroev.net


Course plan:

  • Radiation terms and definitions
  • Stellar photospheres
  • Stellar atmospheres
  • Stellar winds
  • Interstellar Medium
  • Accretion discs
  • etc…

Theoretical and practical considerations will be supplemented with the home exercises which constitute the important part of the course.



  • Lecture 1: September 4: Introduction (What is a stellar atmosphere? Spectral Types, Luminosity Classes, Magnitudes, Bolometric Flux and Bolometric Correction)
  • Lecture 2: September 6: Basics about radiative transfer (Radiation terms, Specific and mean intensity, Flux & luminosity, Black body radiation (Planck function), Effective temperature (Stefan-Boltzmann law), Brightness and Color temperatures)
  • Lecture 3: September 11: Basics about radiative transfer (radiation density and pressure), Interaction radiation – matter, Parallel-Ray transfer equation.
  • Lecture 4: September 13: Radiative transfer (Radiative transfer equation in plane-parallel atmosphere. Limb darkening), Solution to transfer equation, Eddington-Barbier relation. Grey atmosphere.