Constraining photon trajectories in black hole shadows

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F24%3AA0000359" target="_blank" >RIV/47813059:19630/24:A0000359 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1140/epjp/s13360-024-05305-w" target="_blank" >https://link.springer.com/article/10.1140/epjp/s13360-024-05305-w</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjp/s13360-024-05305-w" target="_blank" >10.1140/epjp/s13360-024-05305-w</a>

Result language

angličtina

Original language name

Constraining photon trajectories in black hole shadows

Original language description

We examine the shadow cast by a Kerr black hole, focusing on constraints on photons corresponding to different shadow boundaries. The photons are related to different orbital ranges and impact parameter values, creating a map of the shadow boundaries. Our analysis fixes also the conditions under which it is possible to observe an "imprint" of the black hole (outer) ergosurface and (outer) ergoregion on the Kerr black hole shadow boundary. The counter-rotating case resulted strongly constrained with respect to the co-rotating case, constituting a remarkable and significant difference where the counter-rotating component associated with the shadow boundary is strongly distinct from the co-rotating one. However, in this framework, even the co-rotating photons imply restrictions on conditions on the spins and planes, which are bounded by limiting values. We believe the results found here, being a tracer for the central black hole, can constitute new templates for the ongoing observations.

Czech name

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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

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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

2024

Confidentiality

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

Name of the periodical

European Physical Journal Plus

ISSN

2190-5444

e-ISSN

—

Volume of the periodical

139

Issue of the periodical within the volume

6

Country of publishing house

DE - GERMANY

Number of pages

22

Pages from-to

„531-1“-„531-22“

UT code for WoS article

001249493300002

EID of the result in the Scopus database

2-s2.0-85196080396