Kerr–Newman black holes can be generically overspun

Name: Kerr–Newman black holes can be generically overspun
Author: Düztaş, Koray

İsim	Kerr–Newman black holes can be generically overspun
Yazar	Düztaş, Koray
Basım Tarihi:	2019-04-08
Basım Yeri	- Springer Nature
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1434-6044
Kayıt Numarası	9b95a981-a849-408b-8706-197c00766533
Lokasyon	Natural and Mathematical Sciences
Tarih	2019-04-08
Örnek Metin	We construct thought experiments involving the perturbations of Kerr-Newman black holes by neutral test fields to evaluate the validity of the weak form of the cosmic censorship conjecture. We first show that neglecting backreaction effects, extremal Kerr-Newman black holes which satisfy the condition (J(2)/M-4) < (1/3) can be overspun by scalar fields. This result, which could not be discerned in the previous analyses to first order, is prone to be fixed by employing backreaction effects. However the perturbation of Kerr-Newman black holes by neutrino fields leads to a generic overspinning of the black hole due to the absence of a lower limit for the frequency of the incident wave to ensure that it is absorbed by the black hole. For this case, the destruction of the event horizon cannot be fixed by any form of backreaction effects. This result should not be interpreted as a counter-example to any of the previous results which were based on the assumption that the null energy condition is satisfied. We clarify and justify our arguments with numerical examples.
DOI	10.1140/epjc/s10052-019-6851-z
Cilt	79

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Kerr–Newman black holes can be generically overspun

Yazar Düztaş, Koray

Basım Tarihi 2019-04-08

Basım Yeri - Springer Nature

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1434-6044

Kayıt Numarası 9b95a981-a849-408b-8706-197c00766533

Lokasyon Natural and Mathematical Sciences

Tarih 2019-04-08

Örnek Metin We construct thought experiments involving the perturbations of Kerr-Newman black holes by neutral test fields to evaluate the validity of the weak form of the cosmic censorship conjecture. We first show that neglecting backreaction effects, extremal Kerr-Newman black holes which satisfy the condition (J(2)/M-4) < (1/3) can be overspun by scalar fields. This result, which could not be discerned in the previous analyses to first order, is prone to be fixed by employing backreaction effects. However the perturbation of Kerr-Newman black holes by neutrino fields leads to a generic overspinning of the black hole due to the absence of a lower limit for the frequency of the incident wave to ensure that it is absorbed by the black hole. For this case, the destruction of the event horizon cannot be fixed by any form of backreaction effects. This result should not be interpreted as a counter-example to any of the previous results which were based on the assumption that the null energy condition is satisfied. We clarify and justify our arguments with numerical examples.

DOI 10.1140/epjc/s10052-019-6851-z

Cilt 79