Photon Shells, Black Hole Shadows, and Accretion Toroids

被引：0
作者：
Pugliese, D. [1 ]
Stuchlik, Z. [1 ]
机构：
[1] Silesian Univ Opava, Inst Phys, Res Ctr Theoret Phys & Astrophys, Bezrucovo namesti 13, CZ-74601 Opava, Czech Republic
来源：
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2024年 / 275卷 / 02期
关键词：
M87 EVENT HORIZON; RESULTS; VII; POLARIZATION; OBSERVATIONAL SIGNATURES; ENERGY EXTRACTION; KERR; IMAGES; I; FIELD; JETS; EMISSION;
D O I：
10.3847/1538-4365/ad8645
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We analyze the properties of the Kerr black hole (BH) photon shell, focusing on the influence of aggregates of corotating and counterrotating toroids (ringed accretion disks, hereafter RAD), orbiting in the BH photon shell (photon shell "obscuration"). The particular case of a corotating accretion disk orbiting in the BH ergoregion is also investigated. We study influence on the BH shadow boundary, fixing the conditions under which it is possible to observe the ergoregion and RAD "imprint" on the shadows boundary. In general, remarkable differences appear between the counterrotating photon components of the boundary with respect to the corotating ones. Various regions of the shadow boundary generated from orbital regions linked to the aggregates of orbiting structures have been analyzed. In particular, we investigate the bound unstable spherical photon orbits in the ergoregion, or at the inversion point, where (toroidal) phi=0 , or with the impact parameter & ell; = 0 to characterize the effects of the frame dragging on the boundary. Five main classes of BHs have been identified by distinguishable features of their photon shells (and shadow boundaries) in the context of the orbiting RAD.
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页数：38
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