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Frassino, A. M., Rocha, J. V. & Sanna, A. P. (2025). Weak cosmic censorship with spinning particles in Kerr-(A)dS spacetimes. Physics Letters B. 869

A. M. Frassino et al.,  "Weak cosmic censorship with spinning particles in Kerr-(A)dS spacetimes", in Physics Letters B, vol. 869, 2025

@article{frassino2025_1773606034854,
	author = "Frassino, A. M. and Rocha, J. V. and Sanna, A. P.",
	title = "Weak cosmic censorship with spinning particles in Kerr-(A)dS spacetimes",
	journal = "Physics Letters B",
	year = "2025",
	volume = "869",
	number = "",
	doi = "10.1016/j.physletb.2025.139877",
	url = "https://www.sciencedirect.com/journal/physics-letters-b"
}

TY  - JOUR
TI  - Weak cosmic censorship with spinning particles in Kerr-(A)dS spacetimes
T2  - Physics Letters B
VL  - 869
AU  - Frassino, A. M.
AU  - Rocha, J. V.
AU  - Sanna, A. P.
PY  - 2025
SN  - 0370-2693
DO  - 10.1016/j.physletb.2025.139877
UR  - https://www.sciencedirect.com/journal/physics-letters-b
AB  - We investigate the weak cosmic censorship conjecture by analyzing the dynamics of spinning timelike particles dropped along the rotational axis of an extremal Kerr-(anti-)de Sitter black hole. This idea was first considered in a seminal paper by Wald and later by Needham but both analyses were restricted to asymptotically flat spacetimes. We generalize these studies, involving spinning particles, to rotating spacetimes with non vanishing cosmological constant. We examine whether the absorption of such particles can overspin the black hole beyond extremality, potentially leading to the formation of a naked singularity. In asymptotically de Sitter spacetime, we find that particles that are captured cannot overspin the black hole. Similar conclusions hold also with anti-de Sitter asymptotics, but the analysis is more subtle, requiring careful consideration of the point particle approximation.
ER  -