Thermodynamics of Asymptotically Flat Dyonic Black Holes
arXiv:1907.10681 · doi:10.1103/PhysRevD.101.124030
Abstract
We investigate the thermodynamics of dyonic hairy black holes in flat spacetime when the asymptotic value of the scalar field is not fixed. We use the quasilocal formalism of Brown and York and corresponding boundary terms that make the variational principle well defined to prove that the scalar charges do not contribute to the first law of thermodynamics. We also provide a unified picture of obtaining exact solutions by comparing two different methods and discuss in detail the ansatz used in each coordinate system and the relation between them.
20 pages; modifitations required by referees, 8 references added
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