Optical effects related to Keplerian discs orbiting Kehagias-Sfetsos naked singularities

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F14%3A%230005079" target="_blank" >RIV/47813059:19240/14:#0005079 - isvavai.cz</a>

Výsledek na webu

<a href="http://iopscience.iop.org/0264-9381/31/19/195013/" target="_blank" >http://iopscience.iop.org/0264-9381/31/19/195013/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0264-9381/31/19/195013" target="_blank" >10.1088/0264-9381/31/19/195013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Optical effects related to Keplerian discs orbiting Kehagias-Sfetsos naked singularities

Popis výsledku v původním jazyce

We demonstrate possible optical signatures of the Kehagias-Sfetsos (KS) naked singularity spacetimes representing a spherically symmetric vacuum solution of the modified Horava gravity. In such spacetimes, accretion structures significantly different from those present in standard black hole spacetimes occur due to the 'antigravity' effect, which causes an internal static sphere surrounded by Keplerian discs. We focus our attention on the optical effects related to the Keplerian accretion discs, constructing the optical appearance of the Keplerian discs, the spectral continuum due to their thermal radiation, and the spectral profiled lines generated in the innermost parts of such discs. The KS naked singularity signature is strongly encoded in the characteristics of predicted optical effects, especially in cases where the spectral continuum and spectral lines are profiled by the strong gravity of the spacetimes due to the vanishing region of the angular velocity gradient influencing th

Název v anglickém jazyce

Optical effects related to Keplerian discs orbiting Kehagias-Sfetsos naked singularities

Popis výsledku anglicky

We demonstrate possible optical signatures of the Kehagias-Sfetsos (KS) naked singularity spacetimes representing a spherically symmetric vacuum solution of the modified Horava gravity. In such spacetimes, accretion structures significantly different from those present in standard black hole spacetimes occur due to the 'antigravity' effect, which causes an internal static sphere surrounded by Keplerian discs. We focus our attention on the optical effects related to the Keplerian accretion discs, constructing the optical appearance of the Keplerian discs, the spectral continuum due to their thermal radiation, and the spectral profiled lines generated in the innermost parts of such discs. The KS naked singularity signature is strongly encoded in the characteristics of predicted optical effects, especially in cases where the spectral continuum and spectral lines are profiled by the strong gravity of the spacetimes due to the vanishing region of the angular velocity gradient influencing th

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GB14-37086G" target="_blank" >GB14-37086G: Centrum Alberta Einsteina pro gravitaci a astrofyziku</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Classical and Quantum Gravity

ISSN

0264-9381

e-ISSN

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Svazek periodika

31

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

50

Strana od-do

"195013 - 1"-"195013 - 50"

Kód UT WoS článku

000343411400013

EID výsledku v databázi Scopus

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