BGU Physics Department
*Radiation and matter in the Universe*

For student of physics

Course Number 203-2-4701

given at semester 2018A

## Staff

Lecturer:

Prof. Yuri
Lyubarsky
Syllabus:

1.
Description
of
the
radiation
field:
flux,
intensity, photon occupation number. Blackbody radiation.
Brightness

temperature.

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

scattering.

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.

References:

1. G.Rybicki
&
A.Lightman.
Radiative
processes in astrophysics (1979)

2.
T.Padmanabhan. An invitation to astrophysics (2006)

3. R.Bowers & T.Deeming. Astrophysics, v 1,2 (1984)

4. 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: