Publication date: Dec 2005
Abstract:
The discussion of the latitudinal and radial photon motion in the Kerr-
de Sitter (KdS) spacetime is examined by using the „Chinese boxes“
technique. Only the case with a positive cosmological constant is
considered. The latitudinal motion is discussed by using a new motion
constant Q vanishing for motion in the equatorial plane. This will be
more comfortable for the next discussion of the photon off-equatorial
motion in KdS spacetime. For the radial motion an „effective
potential“ governing the photon radial motion is used, circular photon
orbits are determined and their stability is discussed.
Authors:
Truparová Plšková, Kamila; Stuchlík, Zdeněk;