Observational appearances of magnetically charged black holes in Born–Infeld electrodynamics
Abstract In this paper, we investigate the observational appearances of magnetically charged black holes in Born–Infeld (BI) electrodynamics. We examine the effects of the magnetic charge and the BI parameter on the geodesics with different impact parameters. Using the backward ray tracing method, w...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-04-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11431-z |
| _version_ | 1797822669296500736 |
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| author | Shangyu Wen Wei Hong Jun Tao |
| author_facet | Shangyu Wen Wei Hong Jun Tao |
| author_sort | Shangyu Wen |
| collection | DOAJ |
| description | Abstract In this paper, we investigate the observational appearances of magnetically charged black holes in Born–Infeld (BI) electrodynamics. We examine the effects of the magnetic charge and the BI parameter on the geodesics with different impact parameters. Using the backward ray tracing method, we investigate how spherically symmetric accretions interact with black hole shadows and photon spheres. The shadows of infalling accretion are darker than that of static ones. Moreover, the radius of the photon sphere is an intrinsic property of the spacetime independent of accretions. We then study how the thin disk models affect the black hole shadows. After obtaining the transfer functions, we divide photons emitted from the thin disk into three categories: direct emission, lens ring, and photon ring. Applying three emission models, we find that the width of the shadow is dominated by the direct emission, the photon ring and the lens ring can hardly be identified by changing the emission models. |
| first_indexed | 2024-03-13T10:12:33Z |
| format | Article |
| id | doaj.art-5cd15eaaed6f400fa7366f13a179f431 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-03-13T10:12:33Z |
| publishDate | 2023-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-5cd15eaaed6f400fa7366f13a179f4312023-05-21T11:24:41ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-04-0183412210.1140/epjc/s10052-023-11431-zObservational appearances of magnetically charged black holes in Born–Infeld electrodynamicsShangyu Wen0Wei Hong1Jun Tao2Center for Theoretical Physics, College of Physics, Sichuan UniversityDepartment of Astronomy, Beijing Normal UniversityCenter for Theoretical Physics, College of Physics, Sichuan UniversityAbstract In this paper, we investigate the observational appearances of magnetically charged black holes in Born–Infeld (BI) electrodynamics. We examine the effects of the magnetic charge and the BI parameter on the geodesics with different impact parameters. Using the backward ray tracing method, we investigate how spherically symmetric accretions interact with black hole shadows and photon spheres. The shadows of infalling accretion are darker than that of static ones. Moreover, the radius of the photon sphere is an intrinsic property of the spacetime independent of accretions. We then study how the thin disk models affect the black hole shadows. After obtaining the transfer functions, we divide photons emitted from the thin disk into three categories: direct emission, lens ring, and photon ring. Applying three emission models, we find that the width of the shadow is dominated by the direct emission, the photon ring and the lens ring can hardly be identified by changing the emission models.https://doi.org/10.1140/epjc/s10052-023-11431-z |
| spellingShingle | Shangyu Wen Wei Hong Jun Tao Observational appearances of magnetically charged black holes in Born–Infeld electrodynamics European Physical Journal C: Particles and Fields |
| title | Observational appearances of magnetically charged black holes in Born–Infeld electrodynamics |
| title_full | Observational appearances of magnetically charged black holes in Born–Infeld electrodynamics |
| title_fullStr | Observational appearances of magnetically charged black holes in Born–Infeld electrodynamics |
| title_full_unstemmed | Observational appearances of magnetically charged black holes in Born–Infeld electrodynamics |
| title_short | Observational appearances of magnetically charged black holes in Born–Infeld electrodynamics |
| title_sort | observational appearances of magnetically charged black holes in born infeld electrodynamics |
| url | https://doi.org/10.1140/epjc/s10052-023-11431-z |
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