On the red-shift emission from the black hole horizons replicas

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F25%3AA0000413" target="_blank" >RIV/47813059:19630/25:A0000413 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1140/epjc/s10052-025-14746-1?utm_source=getftr&utm_medium=getftr&utm_campaign=getftr_pilot&getft_integrator=clarivate" target="_blank" >https://link.springer.com/article/10.1140/epjc/s10052-025-14746-1?utm_source=getftr&utm_medium=getftr&utm_campaign=getftr_pilot&getft_integrator=clarivate</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-025-14746-1" target="_blank" >10.1140/epjc/s10052-025-14746-1</a>

Result language
angličtina
Original language name
On the red-shift emission from the black hole horizons replicas
Original language description
We examine the red-shift emission from special orbits (horizons replicas) where photons have the same angular velocity, in magnitude, as those of the Kerr black hole (BH) Killing horizons. We focus on two particular contexts of special significance for their observational implications. A set of these orbits is located in the BH photons shell. Therefore the analysis also connects the red-shifting or blue-shifting from replicas (defined through the BH light surfaces) to the BH shadow boundaries. We then concentrate on the equatorial, general relativistic, axially symmetric accretion disks, orbiting around the central attractor. In the analysis we adopted in particular the Polish doughnut models of geometrically thick toroids, to investigate the signals frequency-shifting from the horizons replica as related to the disks surface, inner edge and accretion flows. The findings map the red-shifting and blue-shifting regions of the signals in dependence to the photons impact parameter, view-angle, angular velocity of the emitter and BH spin. Co-rotating and counter-rotating replica could be identified through the red-shifting or blue-shifting of the emitted signals from the mapped regions.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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