Thermodynamics, shadow and quasinormal modes of black holes in five-dimensional Yang-Mills massive gravity.

In this paper, we consider the Einstein-massive gravity coupled to the Yang-Mills gauge field in five dimensions. Concentrating on the static solutions with planar horizon geometry, we explore the thermodynamic behavior in the extended phase space and examine the validity of the first law of thermodynamics besides local thermal stability by the Hessian matrix. We observe that although the topology of boundary is planar, there exists the van der Waals like phase transition for this kind of solution. We find the critical quantities and discuss how the massive and Yang-Mills parameters affect them. Furthermore, some signatures of the first order phase transition such as the swallow-tail behavior of the Gibbs free energy and divergences of the specific heat are given in detail. We continue with the calculation of the photon sphere and the shadow observed by a distant observer. Finally, we use the WKB method to investigate the quasinormal modes for scalar perturbation under changing the massive and Yang-Mills parameters.