Kerr-NUT Thermodynamics: Misner Strings and Nut Charges

Abstract

Using the thermodynamic approach introduced in e-Print: 2206.09124 [hep-th] to the case of Kerr-NUT solution, we demonstrate the existence of a new conserved quantity that is dual to the angular momentum, in the same way that the nut charge "n" is dual to the mass "m". This quantity exists regardless of the presence of the Kerr rotation parameter $a$, but only affects its thermodynamics when $a\neq 0$. The thermodynamic quantities calculated together with the two charges $N_{c}=cn$ and $N_{n}=n$ lead to consistent thermodynamic relations. That is, the first law, Smarr's and Gibbs-Duhem relations are all satisfied.