Cosmological Constant Effect on Charged and Rotating Black Hole Shadows

A. Belhaj; A. El Balali; H. El Moumni; M. Benali; W. El Hadri

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Cosmological Constant Effect on Charged and Rotating Black Hole Shadows

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arxiv 2007.09058 v2 pith:XUBAKJUP submitted 2020-07-17 gr-qc hep-th

A. Belhaj , M. Benali , A. El Balali , W. El Hadri , H. El Moumni This is my paper · ORCID

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Motivated by recent astrophysical observations, we investigate the shadow behaviors of four dimensional charged rotating black holes with a cosmological constant. This study is made in terms of a reduced moduli space parameterized by the charge and the rotation parameters. For fixed observers, we analyse in some details the shadow behaviors and the corresponding naked singularities of Kerr-Newman and Kerr-Sen four-dimensional black holes in Anti de Sitter backgrounds. Then, a comparative discussion is provided by computing the geometrical observables and the energy emission rate.

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