Photon Shells, Black Hole Shadows, and Accretion Toroids
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 d...
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal Supplement Series |
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| Online Access: | https://doi.org/10.3847/1538-4365/ad8645 |
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| author | D. Pugliese Z. Stuchlík |
| author_facet | D. Pugliese Z. Stuchlík |
| author_sort | D. Pugliese |
| collection | DOAJ |
| description | 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) $\dot{\phi }=0$ , or with the impact parameter ℓ = 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. |
| format | Article |
| id | doaj-art-2c08bf15e657409cb8f3de3d295bae83 |
| institution | OA Journals |
| issn | 0067-0049 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Supplement Series |
| spelling | doaj-art-2c08bf15e657409cb8f3de3d295bae832025-08-20T02:36:02ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492024-01-0127524510.3847/1538-4365/ad8645Photon Shells, Black Hole Shadows, and Accretion ToroidsD. Pugliese0Z. Stuchlík1Research Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava , Bezručovo náměstí 13, CZ-74601 Opava, Czech Republic ; daniela.pugliese@physics.slu.czResearch Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava , Bezručovo náměstí 13, CZ-74601 Opava, Czech Republic ; daniela.pugliese@physics.slu.czWe 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) $\dot{\phi }=0$ , or with the impact parameter ℓ = 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.https://doi.org/10.3847/1538-4365/ad8645Kerr black holesMaximal Kerr black holesClassical black holesRotating black holesSupermassive black holesBlack hole physics |
| spellingShingle | D. Pugliese Z. Stuchlík Photon Shells, Black Hole Shadows, and Accretion Toroids The Astrophysical Journal Supplement Series Kerr black holes Maximal Kerr black holes Classical black holes Rotating black holes Supermassive black holes Black hole physics |
| title | Photon Shells, Black Hole Shadows, and Accretion Toroids |
| title_full | Photon Shells, Black Hole Shadows, and Accretion Toroids |
| title_fullStr | Photon Shells, Black Hole Shadows, and Accretion Toroids |
| title_full_unstemmed | Photon Shells, Black Hole Shadows, and Accretion Toroids |
| title_short | Photon Shells, Black Hole Shadows, and Accretion Toroids |
| title_sort | photon shells black hole shadows and accretion toroids |
| topic | Kerr black holes Maximal Kerr black holes Classical black holes Rotating black holes Supermassive black holes Black hole physics |
| url | https://doi.org/10.3847/1538-4365/ad8645 |
| work_keys_str_mv | AT dpugliese photonshellsblackholeshadowsandaccretiontoroids AT zstuchlik photonshellsblackholeshadowsandaccretiontoroids |