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

@article{74961,
   author = {Pugliese, Daniela and Stuchlík, Zdeněk},
   article_number = {July 2023},
   doi = {http://dx.doi.org/10.1016/j.nuclphysb.2023.116229},
   keywords = {black-holes;naked singularities;disks;field;simulations;evolution;motion;flow},
   language = {eng},
   issn = {0550-3213},
   journal = {Nuclear Physics B},
   title = {Super-spinning Kerr attractors: Observational signatures of accretion tori and proto-jets},
   url = {https://www.sciencedirect.com/science/article/pii/S055032132300158X?via%3Dihub},
   volume = {992},
   year = {2023}
}

TY  - JOUR
ID  - 74961
AU  - Pugliese, Daniela - Stuchlík, Zdeněk
PY  - 2023
TI  - Super-spinning Kerr attractors: Observational signatures of accretion tori and proto-jets
JF  - Nuclear Physics B
VL  - 992
IS  - July 2023
SP  - "116229-1"-"116229-37"
EP  - "116229-1"-"116229-37"
SN  - 05503213
KW  - black-holes;naked singularities;disks;field;simulations;evolution;motion;flow
UR  - https://www.sciencedirect.com/science/article/pii/S055032132300158X?via%3Dihub
N2  - 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.
ER  - 

PUGLIESE, Daniela a Zdeněk STUCHLÍK. Super-spinning Kerr attractors: Observational signatures of accretion tori and proto-jets. \textit{Nuclear Physics B}. 2023, roč.~992, July 2023, s.~''116229-1''-''116229-37'', 37 s. ISSN~0550-3213. Dostupné z: https://dx.doi.org/10.1016/j.nuclphysb.2023.116229.