Polarized image of an equatorial emitting ring around a rotating braneworld black hole
Abstract We have studied the polarized image of an equatorial emitting ring around a rotating braneworld black hole. This black hole possesses a tidal charge parameter b, which describes the effects of the free gravitational field in the bulk on the brane. Results show that the effects of the tidal...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14285-9 |
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| Summary: | Abstract We have studied the polarized image of an equatorial emitting ring around a rotating braneworld black hole. This black hole possesses a tidal charge parameter b, which describes the effects of the free gravitational field in the bulk on the brane. Results show that the effects of the tidal charge parameter on the polarized image depend on the magnetic field structure, the observer inclination, the velocity of the fluid and the radii of the emitting ring. For a given value of the rotation parameter, the observed polarization intensity increases monotonously with b when the magnetic field lies in the equatorial plane, while it no longer changes monotonically with b when the magnetic field is perpendicular to the equatorial plane. The effect of parameter b on polarized images is similar in both stronger and weaker gravitational fields when the magnetic field is within the equatorial plane, and the differences in polarization vectors for different b become noticeable in stronger gravitational fields. We also probe the effects of b on the Stokes Q-U loops. |
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| ISSN: | 1434-6052 |