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Accretion processes in astrophysics

by prof. Bożena Czerny (CFT)


Aim of the lecture: Accretion provides the energy for the most spectacular phenomena observed in astronomy: gamma-ray bursts, quasars, and emergence of gravitational waves. In my lecture I will concentrate mostly on semi-stationary accretion processes behind the persistent sources of emission. I will present the basic theoretical background needed to understand the accretion process, and the theory will be used to confront with the data in order to see which aspects of the accretion process in different objects is understood, and where the progress in being slow.

List of the lectures:

  1. Accretion processes in astrophysics - an introduction (pdf) 
  2. Basic parameters of accretion flow (pdf)
  3. Examples of accretion flow in astrophysical objects (pdf)
  4. Spherical accretion (pdf)
  5. Motion of a test particle in the gravitational field of a black hole (pdf)
  6. Classical accretion disks (pdf)
  7. Radiative transfer (pdf)
  8. Compton process and two-phase medium of accretion flow (pdf)
  9. Time evolution of accretion disks, stationarity, stability (pdf)
  10. Mathematical description of variability (pdf)
  11. Magneto-hydrodynamic simulations of accretion flows (pdf)
  12. Gamma-ray burst, jet formation and unsolved problems (pdf)
  13. Applications: main sequence stars, white dwarfs (pdf)
  14. Applications: neutron stars and galactic black hole (pdf)
  15. Applications: active galactic nuclei (pdf)