Optical properties of a Brane-World black hole as photons couple to the Weyl tensor
| Autor: | Zhang, He-Xu, Li, Cong, He, Peng-Zhang, Fan, Qi-Qi, Deng, Jian-Bo |
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| Rok vydání: | 2019 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1140/epjc/s10052-020-8022-7 |
| Popis: | In this article, we have investigated the equations of motion of the photons coupled to Weyl tensor by the geometric optics approximation and the corresponding shadow in a Brane-World black hole spacetime. It is shown that there exists a double shadow for a black hole since the coupling photons with different polarization directions propagate along different paths in the spacetime. Furthermore, we discuss the effects of the metric parameter $\alpha$ related to the cosmological constant, X-cold dark matter parameter $\beta$ and the coupling parameter $\lambda$ on the umbra (the overlap region of the double shadow) and the penumbra. We also obtain the finite-distance corrections to the deflection angle of light in the Brane-World black hole spacetime as the photons coupled to Weyl tensor by using a recent geometric method. Comment: arXiv admin note: text overlap with arXiv:1502.01088, arXiv:1611.08783, arXiv:1606.04634 by other authors |
| Databáze: | arXiv |
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