Thermodynamics of Newman-Unti-Tamburino charged spaces

摘要: We discuss and compare at length the results of two methods used recently to describe thermodynamics Taub-Newman-Unti-Tamburino (NUT) solutions in a de Sitter background. In first approach ($\mathbb{C}$ approach), one deals with an analytically continued version metric while second ($\mathbb{R}$ discussion is carried out using unmodified Lorentzian signature. No analytic continuation performed on coordinates and/or parameters that appear metric. find both these approaches are completely equivalent modulo we provide exact prescription relates methods. The extension AdS/flat cases aims give physical interpretation NUT-charged spacetimes sector. also briefly higher-dimensional spaces note that, analogous absence hyperbolic NUTs AdS backgrounds, there no spherical Taub-NUT-dS solutions.