Speaker
Description
The Kiselev metric has gained increasing relevance in recent years due to its ability to model a variety of physical systems. It describes a black hole influenced by the presence of an anisotropic fluid—composed of the superposition of a perfect fluid, an electromagnetic field, and a scalar field. Depending on the equation of state parameter $\omega$, this metric can model dispersed gases in nebulae, accretion disks, and even dark matter. The metric becomes even more compelling for describing the environment around compact objects when a rotation parameter $a$ is introduced. In this work we analyze photon geodesics in de Sitter-type spacetimes described by the rotating Kiselev metric. Furthermore, we investigate the dynamical stability of this solution without rotation through the calculation of quasinormal modes and their corresponding quasinormal frequencies.
