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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F23%3AA0000278" target="_blank" >RIV/47813059:19630/23:A0000278 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S055032132300158X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S055032132300158X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nuclphysb.2023.116229" target="_blank" >10.1016/j.nuclphysb.2023.116229</a>

Result language

angličtina

Original language name

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

Original language description

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 ⠂&amp; 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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Nuclear Physics B

ISSN

0550-3213

e-ISSN

1873-1562

Volume of the periodical

992

Issue of the periodical within the volume

July 2023

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

37

Pages from-to

„116229-1“-„116229-37“

UT code for WoS article

001054885600001

EID of the result in the Scopus database

2-s2.0-85159816459