PUGLIESE, Daniela and Zdeněk STUCHLÍK. Super-spinning Kerr attractors: Observational signatures of accretion tori and proto-jets. Nuclear Physics B. 2023, vol. 992, July 2023, p. "116229-1"-"116229-37", 37 pp. ISSN 0550-3213. Available from: https://dx.doi.org/10.1016/j.nuclphysb.2023.116229.
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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
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
WWW 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
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 26/2/2024 12:12.
Abstract
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.
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