https://doi.org/10.1140/epjc/s10052-023-11561-4
Regular Article - Theoretical Physics
Classifying topology of consistent thermodynamics of the four-dimensional neutral Lorentzian NUT-charged spacetimes
School of Physics and Astronomy, China West Normal University, 637002, Nanchong, Sichuan, People’s Republic of China
Received:
15
February
2023
Accepted:
27
April
2023
Published online:
5
May
2023
In this paper, via employing the uniformly modified form of the generalized off-shell Helmholtz free energy, we investigate the topological numbers for the four-dimensional neutral Lorentzian Taub–NUT, Taub–NUT–AdS and Kerr–NUT spacetimes, and find that these solutions can also be classified into one of three types of those well-known black hole solutions, which implies that these spacetimes should be viewed as generic black holes from the viewpoint of the thermodynamic topological approach.
© The Author(s) 2023
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