Perturbation analysis for massless spin fields in accelerating Kerr-Newman-(anti-)de Sitter black holes

We obtain the wave equation of the perturbation theory governing massless fields of spin 0, 1/2, 1, 3/2 and 2 in accelerating Kerr-Newman-(anti-)de Sitter black holes. We show that the wave equation is separable and the radial and angular equations can both be transformed into Heun's equation. We approximate Heun's equation and analyze the solution of radial function near the event horizon. It is worth pointing out that all the field equations collapse to a unique equation which means it can provide a possible way for the analog research between the gravitational field and those other fields.