J 2023

Super-spinning Kerr attractors: Observational signatures of accretion tori and proto-jets

PUGLIESE, Daniela and Zdeněk STUCHLÍK

Basic 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:

URL

RIV identification code

RIV/47813059:19630/23:A0000278

Organization unit

Institute of physics in Opava

DOI

http://dx.doi.org/10.1016/j.nuclphysb.2023.116229

UT WoS

001054885600001

Keywords in English

black-holes;naked singularities;disks;field;simulations;evolution;motion;flow

Tags

RIV24, UF

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.
Displayed: 28/12/2024 06:20