Nature of inner light rings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10495415" target="_blank" >RIV/00216208:11320/24:10495415 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=pfRuTxU2tO" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=pfRuTxU2tO</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.110.084026" target="_blank" >10.1103/PhysRevD.110.084026</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nature of inner light rings

Popis výsledku v původním jazyce

Nonsingular horizonless ultracompact objects provide a simple resolution to the black holes singularity problem. It has been shown that, if these objects are compact enough to exhibit the presence of the light ring required to mimic the phenomenology of general relativity black holes, they must have at least one additional light ring. The stability of the inner light ring has been proven under the assumptions of Einstein equations and the validity of the null energy condition. Since this can have important repercussions on the instability of a horizonless ultracompact object and the existence of the latter requires some modified gravitational dynamics and/or exotic matter, it is desirable to obtain a model-independent proof of the stability of the additional light ring. In this paper, we prove the stability of the inner light ring without any assumption on the dynamics of the theory, while assuming that the outer light ring has the same properties as the Kerr light ring. Given the stringent observational constraints on the geometry at the outer light ring scale, our result now rests solely on geometric considerations and applies to any theory of gravity with any matter content that cannot be ruled out by observations.

Název v anglickém jazyce

Nature of inner light rings

Popis výsledku anglicky

Nonsingular horizonless ultracompact objects provide a simple resolution to the black holes singularity problem. It has been shown that, if these objects are compact enough to exhibit the presence of the light ring required to mimic the phenomenology of general relativity black holes, they must have at least one additional light ring. The stability of the inner light ring has been proven under the assumptions of Einstein equations and the validity of the null energy condition. Since this can have important repercussions on the instability of a horizonless ultracompact object and the existence of the latter requires some modified gravitational dynamics and/or exotic matter, it is desirable to obtain a model-independent proof of the stability of the additional light ring. In this paper, we prove the stability of the inner light ring without any assumption on the dynamics of the theory, while assuming that the outer light ring has the same properties as the Kerr light ring. Given the stringent observational constraints on the geometry at the outer light ring scale, our result now rests solely on geometric considerations and applies to any theory of gravity with any matter content that cannot be ruled out by observations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/GA23-07457S" target="_blank" >GA23-07457S: Skryté symetrie a chemie černých děr</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

110

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

084026

Kód UT WoS článku

001339043300011

EID výsledku v databázi Scopus

2-s2.0-85208373856