Publication date: Apr 2007
Abstract:
Coordinate-independent definition of the characteristic, so-called „humpy“ frequency related to the positive gradient of the orbital velocity in locally non-rotating frames around nearly extreme Kerr black holes is given and compared with the epicyclic and orbital frequencies for both Keplerian thin discs and limiting marginally stable thick discs.
Authors:
Stuchlík, Zdeněk; Slaný, Petr; Török, Gabriel;