Evolution of Kerr superspinars due to accretion counterrotating thin discs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F11%3A%230004066" target="_blank" >RIV/47813059:19240/11:#0004066 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/0264-9381/28/15/155017" target="_blank" >http://dx.doi.org/10.1088/0264-9381/28/15/155017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0264-9381/28/15/155017" target="_blank" >10.1088/0264-9381/28/15/155017</a>

Result language

angličtina

Original language name

Evolution of Kerr superspinars due to accretion counterrotating thin discs

Original language description

String theory predicts the existence of extremely compact objects spinning faster than Kerr black holes. The spacetime exterior to such superspinars is described by Kerr naked singularity geometry breaking the black-hole limit on the internal angular momentum. We demonstrate that the conversion of Kerr superspinars into a near-extreme black hole due to an accretion counterrotating Keplerian disc is much more effective in comparison with the case of a corotating one since both the accreted rest mass necessary for conversion and the evolution time of conversion are by orders smaller for counterrotating discs. The conversion time of Kerr superspinars is given for several accretion regimes, and it is shown that the self-regulated accretion flow implies fastest evolution to the black-hole state. In the final stages of the conversion, Kerr superspinars can serve as very efficient particle accelerators in the region where the black-hole horizon forms.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BE - Theoretical physics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2011

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

CLASSICAL AND QUANTUM GRAVITY

ISSN

0264-9381

e-ISSN

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Volume of the periodical

28

Issue of the periodical within the volume

15

Country of publishing house

GB - UNITED KINGDOM

Number of pages

23

Pages from-to

1-23

UT code for WoS article

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EID of the result in the Scopus database

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