Detailed Information on Publication Record
2018
Observers in Kerr spacetimes: the ergoregion on the equatorial plane
PUGLIESE, Daniela and Hernando QUEVEDOBasic information
Original name
Observers in Kerr spacetimes: the ergoregion on the equatorial plane
Authors
PUGLIESE, Daniela (380 Italy, guarantor, belonging to the institution) and Hernando QUEVEDO (170 Colombia)
Edition
European Physical Journal C, 2018, 1434-6044
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
United States of America
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
RIV identification code
RIV/47813059:19240/18:A0000276
Organization unit
Faculty of Philosophy and Science in Opava
UT WoS
000428516500001
Keywords in English
stationary observers; Kerr spacetime; ergoregion; gravitation; black holes; naked singularities
Tags
International impact, Reviewed
Links
GJ16-03564Y, research and development project.
Změněno: 4/4/2019 11:52, RNDr. Jan Hladík, Ph.D.
Abstract
V originále
We perform a detailed analysis of the properties of stationary observers located on the equatorial plane of the ergosphere in aKerr spacetime, including light-surfaces. This study highlights crucial differences between black hole and the super-spinner sources. In the case of Kerr naked singularities, the results allow us to distinguish between 'weak' and 'strong' singularities, corresponding to spin values close to or distant from the limiting case of extreme black holes, respectively. We derive important limiting angular frequencies for naked singularities. We especially study very weak singularities as resulting from the spin variation of black holes. We also explore the main properties of zero angular momentum observers for different classes of black hole and naked singularity spacetimes.