Profiled spectral lines generated by Keplerian discs orbiting in the Bardeen and Ayòn-Beato-Garcìa spacetimes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F16%3AN0000021" target="_blank" >RIV/47813059:19240/16:N0000021 - isvavai.cz</a>

Výsledek na webu

<a href="http://iopscience.iop.org/article/10.1088/0264-9381/33/8/085004/meta" target="_blank" >http://iopscience.iop.org/article/10.1088/0264-9381/33/8/085004/meta</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0264-9381/33/8/085004" target="_blank" >10.1088/0264-9381/33/8/085004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Profiled spectral lines generated by Keplerian discs orbiting in the Bardeen and Ayòn-Beato-Garcìa spacetimes

Popis výsledku v původním jazyce

Shape and frequency-shift maps of direct and indirect images of Keplerian discs orbiting in Bardeen and Ayon-Beato-Garcia (ABG) black hole and no-horizon spacetimes are determined. Then profiles of spectral lines generated in the innermost parts of the Keplerian discs in the Bardeen and ABG spacetimes are constructed. The frequency-shift maps and profiled spectral lines are compared to those generated in the field of Schwarzschild black holes and possible observationally relevant signatures of the regular black hole and no-horizon spacetimes are discussed. We demonstrate that differences relative to the Schwarzschild spacetimes are for the no-horizon spacetimes much more profound in comparison to the regular black hole spacetimes and increase with increasing charge parameter of the spacetime. The differences are greater. for small and large inclination angles than for intermediate ones. For the no-horizon spacetimes, the differences enable us. to distinguish the Bardeen and ABG spacetime, if inclination angle to the distant observer is known. We also show that contribution of the so-called ghost images to the profiled lines increases with increasing charge parameter of the spacetimes.

Název v anglickém jazyce

Profiled spectral lines generated by Keplerian discs orbiting in the Bardeen and Ayòn-Beato-Garcìa spacetimes

Popis výsledku anglicky

Shape and frequency-shift maps of direct and indirect images of Keplerian discs orbiting in Bardeen and Ayon-Beato-Garcia (ABG) black hole and no-horizon spacetimes are determined. Then profiles of spectral lines generated in the innermost parts of the Keplerian discs in the Bardeen and ABG spacetimes are constructed. The frequency-shift maps and profiled spectral lines are compared to those generated in the field of Schwarzschild black holes and possible observationally relevant signatures of the regular black hole and no-horizon spacetimes are discussed. We demonstrate that differences relative to the Schwarzschild spacetimes are for the no-horizon spacetimes much more profound in comparison to the regular black hole spacetimes and increase with increasing charge parameter of the spacetime. The differences are greater. for small and large inclination angles than for intermediate ones. For the no-horizon spacetimes, the differences enable us. to distinguish the Bardeen and ABG spacetime, if inclination angle to the distant observer is known. We also show that contribution of the so-called ghost images to the profiled lines increases with increasing charge parameter of the spacetimes.

Druh

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

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

—

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)

Rok uplatnění

2016

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

—

Svazek periodika

33

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

33

Strana od-do

'085004-1'-'085004-33'

Kód UT WoS článku

000374832400004

EID výsledku v databázi Scopus

2-s2.0-84963975899