Efficiency of the Keplerian accretion in braneworld Kerr-Newman spacetimes and mining instability of some naked singularity spacetimes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F16%3AN0000015" target="_blank" >RIV/47813059:19240/16:N0000015 - isvavai.cz</a>
Result on the web
<a href="http://journals.aps.org/prd/abstract/10.1103/PhysRevD.94.086006" target="_blank" >http://journals.aps.org/prd/abstract/10.1103/PhysRevD.94.086006</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.94.086006" target="_blank" >10.1103/PhysRevD.94.086006</a>
Alternative languages
Result language
angličtina
Original language name
Efficiency of the Keplerian accretion in braneworld Kerr-Newman spacetimes and mining instability of some naked singularity spacetimes
Original language description
We show that the braneworld rotating Kerr-Newman black hole and naked singularity spacetimes with both positive and negative braneworld tidal charge parameters can be separated into 14 classes according to the properties of circular geodesics governing the Keplerian accretion. We determine the efficiency of the Keplerian accretion disks for all braneworld Kerr-Newman spacetimes. We demonstrate the occurrence of an infinitely deep gravitational potential in Kerr-Newman naked singularity spacetimes having the braneworld dimensionless tidal charge $ b in (1/4, 1)$ and the dimensionless spin $a in (2 sqrt{b} - sqrt{b(4b - 1)}, 2 sqrt{b} + sqrt{b(4b - 1)}), implying unbound efficiency of the Keplerian accretion and the possibility of extracting the whole naked singularity mass. Therefore, we call them braneworld "mining-unstable" Kerr-Newman naked singularity spacetimes. Fundamental restriction on the relevance of the extraordinary-but fully classical-phenomenon of the mining instability is given by validity of the assumption of geodesic motion of the accreting matter.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GB14-37086G" target="_blank" >GB14-37086G: Albert Einstein Center for Gravitation and Astrophysics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
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Volume of the periodical
94
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
28
Pages from-to
'086006-1'-'086006-28'
UT code for WoS article
000386173500003
EID of the result in the Scopus database
2-s2.0-84991717350