J
2023
Extreme amplification regimes of the Schwarzschild gravitational lens
BAKALA, Pavel, Alena BAKALOVA, Riccardo LA PLACA, Maurizio FALANGA, Luigi STELLA et. al.
Základní údaje
Originální název
Extreme amplification regimes of the Schwarzschild gravitational lens
Autoři
BAKALA, Pavel (203 Česká republika, domácí), Alena BAKALOVA, Riccardo LA PLACA, Maurizio FALANGA a Luigi STELLA
Vydání
ASTRONOMY & ASTROPHYSICS, LES ULIS CEDEX A, EDP SCIENCES S A, 2023, 0004-6361
Další údaje
Typ výsledku
Článek v odborném periodiku
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/47813059:19630/23:A0000322
Organizační jednotka
Fyzikální ústav v Opavě
Klíčová slova anglicky
gravitational lensing;strong;black hole physics;methods;analytical
Příznaky
Mezinárodní význam, Recenzováno
V originále
We investigated a complete set of relativistic images of a small source located at an arbitrary distance from a Schwarzschild black hole gravitational lens. This paper offers a description of a simple and efficient fully relativistic method for calculating the bolometric intensity amplification. We focused our analysis primarily on sources located at small radii and close angular distance from the caustic line, both behind and in front of the compact lens. We term the corresponding large deflection regime 'extreme lensing'. We approximated the regime of fully-relativistic, extreme amplification of point sources by simple analytical formulae valid over a wide range of source distances. Using such approximations, we also derived formulae for the maximum amplification of extended sources close to or intercepted by the caustic line. Simple analytical approximations of the time delay between the brightest consecutive images in extreme amplification regimes are also presented.
Zobrazeno: 25. 12. 2024 10:11