Disclosing connections between black holes and naked singularities: horizon remnants, Killing ...

@article{37443,
   author = {Pugliese, Daniela and Quevedo, Hernando},
   article_number = {3},
   doi = {http://dx.doi.org/10.1140/epjc/s10052-019-6725-4},
   keywords = {black holes; naked singularities; Killing throats; Killing bottlenecks},
   language = {eng},
   issn = {1434-6044},
   journal = {European Physical Journal C},
   title = {Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks},
   url = {https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-019-6725-4},
   volume = {79},
   year = {2019}
}

TY  - JOUR
ID  - 37443
AU  - Pugliese, Daniela - Quevedo, Hernando
PY  - 2019
TI  - Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks
JF  - European Physical Journal C
VL  - 79
IS  - 3
SP  - "209-1"-"209-31"
EP  - "209-1"-"209-31"
SN  - 14346044
KW  - black holes
KW  - naked singularities
KW  - Killing throats
KW  - Killing bottlenecks
UR  - https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-019-6725-4
L2  - https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-019-6725-4
N2  - We study the properties of black holes and naked singularities by considering stationary observers and light surfaces in Kerr spacetimes. We reconsider the notion of Killing horizons from a special perspective by exploring the entire family of Kerr metrics. To this end, we introduce the concepts of extended plane, Killing throats and bottlenecks for weak (slowly spinning) naked singularities. Killing bottlenecks (or horizon remnants in analogy with the corresponding definition of throats in black holes) are restrictions of the Killing throats appearing in special classes of slowly spinning naked singularities. Killing bottlenecks appear in association with the concept of pre-horizon regime introduced in de Felice (Mon Not R Astron Soc 252:197-202, 1991) and de Felice and Usseglio-Tomasset (Class Quantum Gravity 8:1871-1880, 1991). In the extended plane of the Kerr spacetime, we introduce particular sets, metric bundles, of metric tensors which allow us to reinterpret the concept of horizon and to find connections between black holes and naked singularities throughout the horizons. To evaluate the effects of frame-dragging on the formation and structure of Killing bottlenecks and horizons in the extended plane, we consider also the Kerr-Newman and the Reissner-Norström spacetimes. We argue that these results might be significant for the comprehension of processes that lead to the formation and eventually destruction of Killing horizons.
ER  - 

PUGLIESE, Daniela and Hernando QUEVEDO. Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks. \textit{European Physical Journal C}. 2019, vol.~79, No~3, p.~''209-1''-''209-31'', 31 pp. ISSN~1434-6044. Available from: https://dx.doi.org/10.1140/epjc/s10052-019-6725-4.