BGU Physics Department

Radiation and matter in the Universe
For student of physics

Course Number 203-2-4701
given at semester 2018A


Lecturer:Prof. Yuri Lyubarsky


1. Description of the radiation field: flux, intensity, photon occupation number. Blackbody radiation. Brightness
2. Opacity and emissivity. Kirchhoff law, detailed balance, Einstein coefficients.
3. Equation of radiation transfer. Optical depth. Radiation diffusion.
4. Bremsstrahlung and free-free absorption. Thomson scattering.
5. Line spectrum and basics of atomic and molecular spectroscopy. Ionization and recombination.
6. Radiation from relativistically moving sources. Synchrotron emission and absorption. Inverse Compton
7. Basics of nuclear physics: strong, weak and electromagnetic interactions; nuclear binding energy.
8. Stellar structure. Nuclear reactions in stars. Solar neutrino. Main sequence: pp and CNO cycles,
    mass-luminosity relation. Beyond the main sequence: helium burning and red giants.
9. Final stages of stellar evolution. Properties of degenerate matter. Chandrasekhar limit. White dwarfs,
    neutron stars, black holes.
10. Cosmic rays. Nuclear interaction of relativistic particles. CR diffusion in the Galaxy.


G.Rybicki & A.Lightman. Radiative processes in astrophysics (1979)
T.Padmanabhan. An invitation to astrophysics (2006)
3. R.Bowers & T.Deeming. Astrophysics, v 1,2 (1984)

M.Longair. High energy astrophysics (2011)

Lectures on Thursdays, 12:00 - 15:00, in the seminar room

Policy: A set of home assignments will be given approximately every 2-3 weeks. The grade is combined as follows: 80% based on the exam and 20% on the homework. All the works submitted by the students will be checked, so that the grade on the homework part is an average grade on all the problem solutions that have been submitted.

Lecture notes: