We find the quasinormal modes of the charged scalar and Dirac fields in the background of the rotating charged black holes, described by the Kerr-Newman-de Sitter solution. The dependence of the quasinormal spectrum upon the black hole parameters mass $M$, angular momentum $a$, charge $Q$, as well as on values of the $\Lambda$-term and a field charge $q$ is investigated. Special attention is given to the near extremal limit of the black hole charge. In particular, we find that for both scalar and Dirac fields, charged perturbations decay quicker for $q>0$ and slower for $q<0$ for values of black holes charge $Q$ less than some threshold value, which is close to the extremal value of charge and depend on parameters of the black holes.

• Received 18 July 2007

DOI:https://doi.org/10.1103/PhysRevD.76.084018