SCHEE, Jan a Zdeněk STUCHLÍK. Profiled spectral lines of Keplerian rings orbiting in the regular Bardeen black hole spacetimes. European Physical Journal C. roč. 79, č. 12, s. "988-1"-"988-14", 14 s. ISSN 1434-6044. doi:10.1140/epjc/s10052-019-7420-1. 2019.
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Základní údaje
Originální název Profiled spectral lines of Keplerian rings orbiting in the regular Bardeen black hole spacetimes
Autoři SCHEE, Jan (203 Česká republika, garant, domácí) a Zdeněk STUCHLÍK (203 Česká republika, domácí).
Vydání European Physical Journal C, 2019, 1434-6044.
Další údaje
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10308 Astronomy
Stát vydavatele Německo
Utajení není předmětem státního či obchodního tajemství
WWW URL
Kód RIV RIV/47813059:19240/19:A0000411
Organizační jednotka Filozoficko-přírodovědecká fakulta v Opavě
Doi http://dx.doi.org/10.1140/epjc/s10052-019-7420-1
UT WoS 000505552500005
Klíčová slova anglicky Bardeen black hole; spectral lines; Keplerian rings
Štítky , GB14-37086G, RCTPA, RIVOK
Příznaky Mezinárodní význam, Recenzováno
Návaznosti GB14-37086G, projekt VaV.
Změnil Změnil: RNDr. Jan Hladík, Ph.D., učo 25379. Změněno: 20. 3. 2020 08:36.
Anotace
Considering the regular Bardeen black hole spacetimes, we test the observational effects of the general relativistic solutions coupled to non-linear electrodynamics (NED) by studying the photon motion in the effective geometry governed by the spacetime geometry and the NED Lagrangian. We focus our attention to the observationally important case of profiled spectral lines generated by rings radiating in a fixed frequency and orbiting the black hole along circular geodesics of the Bardeen spacetime. Such profiled spectral lines are observed in active galactic nuclei and in microquasars, giving sufficient data for the test of regular black holes. We expect that such radiating rings could arise around the Galaxy central supermassive black hole SgrA*, and the related profiled spectral lines could give important additional information to those obtained by direct observations due to the Event Horizon (GRAVITY) Telescope. We demonstrate that the profiled spectral lines of the radiating rings predict strong signatures of the NED effects on the photon motion namely the frequency shift to the red edge of the spectrum, and narrowing of the profile, by more than one order in comparison with the case of the profiles generated purely by the spacetime geometry, for all values of the magnetic charge and the inclination angle of the observer. The specific flux is substantially suppressed and for extended Keplerian disks even the shape of the profiled line is significantly modified due to the NED effect.
VytisknoutZobrazeno: 28. 3. 2024 23:44