Detailed Information on Publication Record
2023
Super-spinning Kerr attractors: Observational signatures of accretion tori and proto-jets
PUGLIESE, Daniela and Zdeněk STUCHLÍKBasic information
Original name
Super-spinning Kerr attractors: Observational signatures of accretion tori and proto-jets
Authors
PUGLIESE, Daniela (380 Italy, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)
Edition
Nuclear Physics B, 2023, 0550-3213
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
Netherlands
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
RIV identification code
RIV/47813059:19630/23:A0000278
Organization unit
Institute of physics in Opava
UT WoS
001054885600001
Keywords in English
black-holes;naked singularities;disks;field;simulations;evolution;motion;flow
Tags
International impact, Reviewed
Změněno: 26/2/2024 12:12, Mgr. Pavlína Jalůvková
Abstract
V originále
We study accretion tori and proto-jets in the field of central Kerr super-spinning attractors, exposing distinctions between Kerr naked singularities (NSs) and black holes (BHs). We focus on the spacetime re-gions very close to the central singularity, interior of the ergoregion, especially for slowly spinning NSs, where repulsive gravity effects emerge, discussing the causal structure in relation to tori contained, partially contained and confined in the ergoregion. We explore particularly regions close to the attractor rotational axis and the poles, where very slowly spinning tori, with momenta ⠂& AP; 0, and axial cusp, constrained by the light surfaces, are relevant. Proto-jets (constraining jet emission) proved to be a signature in compari-son with BH case, pointing out the emergence of very fast spinning tori in the ergoregion, very slow tori, double tori with internal cusp, and the presence of an axial cusp. The accretion disks properties point out very faster spinning attractors (extremely super spinning NSs). Providing distinguishable physical charac-teristics of jets and accretion tori, the differences between the BH and NS accretion scenarios, emerging from this analysis, constitute astrophysical tracers distinguishing NSs from BHs, and possible strong NSs observational signature of the primordial Kerr superspinars predicted by string theory.