Black hole signatures from accretion disk observations

Repeats every 2 days until Fri Feb 15 2013 .
Mon, 11/02/2013 - 13:00 - 15:00
Wed, 13/02/2013 - 13:00 - 15:00
Fri, 15/02/2013 - 13:00 - 15:00
Marek A. Abramowicz

The black hole signatures that may be extracted from the
accretion disk observations are connected to the following properties of the strong gravity:
(1) existence of the ISCO,
(2) existence of the ergosphere,
(3) existence of the circular photon orbit
(4) existence of the horizon.
Theoretically, the role of (1)-(4) in the accretion disk structure is well understood.

See his Living Review on "Foundations of Black Hole Accretion Disk Theory"

1st LECTURE: standard disks and the ISCO paradigm: circular geodesics, stability, epicyclic oscillations, the Shakura-Sunyaev flux formula, Narayan's arguments for the horizon signature

2nd LECTURE: fluid disks: thick disks, slim disks, location of the inner edge, spectral fittings, unsolved problems

3rd LECTURE: the Penrose process: ergosphere, the classic Penrose process, the particles collisions near the horizon, the Penrose process for fluids, Blandford-Znajek