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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

<a href="/en/project/GB14-37086G" target="_blank" >GB14-37086G: Albert Einstein Center for Gravitation and Astrophysics</a><br>

Continuities

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

Publication year

2016

Confidentiality

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

Name of the periodical

Classical and Quantum Gravity

ISSN

0264-9381

e-ISSN

—

Volume of the periodical

33

Issue of the periodical within the volume

8

Country of publishing house

GB - UNITED KINGDOM

Number of pages

33

Pages from-to

'085004-1'-'085004-33'

UT code for WoS article

000374832400004

EID of the result in the Scopus database

2-s2.0-84963975899