Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks
Abstract 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 con...
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doaj-ba5670f3d2044470adfc8e5417995fb72020-11-25T02:57:58ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522019-03-0179313110.1140/epjc/s10052-019-6725-4Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecksDaniela Pugliese0Hernando Quevedo1Institute of Physics and Research Centre of Theoretical Physics and Astrophysics, Faculty of Philosophy and Science, Silesian University in OpavaDipartimento di Fisica, Università di Roma “La Sapienza”Abstract 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.http://link.springer.com/article/10.1140/epjc/s10052-019-6725-4 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Daniela Pugliese Hernando Quevedo |
spellingShingle |
Daniela Pugliese Hernando Quevedo Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks European Physical Journal C: Particles and Fields |
author_facet |
Daniela Pugliese Hernando Quevedo |
author_sort |
Daniela Pugliese |
title |
Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks |
title_short |
Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks |
title_full |
Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks |
title_fullStr |
Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks |
title_full_unstemmed |
Disclosing connections between black holes and naked singularities: horizon remnants, Killing throats and bottlenecks |
title_sort |
disclosing connections between black holes and naked singularities: horizon remnants, killing throats and bottlenecks |
publisher |
SpringerOpen |
series |
European Physical Journal C: Particles and Fields |
issn |
1434-6044 1434-6052 |
publishDate |
2019-03-01 |
description |
Abstract 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. |
url |
http://link.springer.com/article/10.1140/epjc/s10052-019-6725-4 |
work_keys_str_mv |
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