Optical Features of AdS Black Holes in the Novel 4D Einstein-Gauss-Bonnet Gravity Coupled to Nonlinear Electrodynamics
An alternative theory of gravity that has attracted much attention recently is the novel four-dimensional Einstein-Gauss-Bonnet (4D EGB) gravity. The theory is rescaled by the Gauss-Bonnet (GB) coupling constant <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" disp...
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MDPI AG
2022-03-01
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| Online Access: | https://www.mdpi.com/2218-1997/8/3/182 |
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| author | Khadije Jafarzade Mahdi Kord Zangeneh Francisco S. N. Lobo |
| author_facet | Khadije Jafarzade Mahdi Kord Zangeneh Francisco S. N. Lobo |
| author_sort | Khadije Jafarzade |
| collection | DOAJ |
| description | An alternative theory of gravity that has attracted much attention recently is the novel four-dimensional Einstein-Gauss-Bonnet (4D EGB) gravity. The theory is rescaled by the Gauss-Bonnet (GB) coupling constant <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>α</mi><mo>→</mo><mi>α</mi><mo>/</mo><mo>(</mo><mi>D</mi><mo>−</mo><mn>4</mn><mo>)</mo></mrow></semantics></math></inline-formula> in <i>D</i> dimensions and redefined as four-dimensional gravity in the limit <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>D</mi><mo>→</mo><mn>4</mn></mrow></semantics></math></inline-formula>. Thus, in this manner, the GB term yields a non-trivial contribution to the gravitational dynamics. In fact, regularized black hole solutions and applications in the novel 4D EGB gravity have also been extensively explored. In this work, motivated by recent astrophysical observations, we present an in-depth study of the optical features of AdS black holes in the novel 4D EGB gravity coupled to exponential nonlinear electrodynamics (NED), such as the shadow geometrical shape, the energy emission rate, the deflection angle and quasinormal modes. Taking into account these dynamic quantities, we investigate the effects on the black hole solution by varying the parameters of the models. More specifically, we show that the variation of the GB and NED parameters, and of the cosmological constant, imprints specific signatures on the optical features of AdS black holes in the novel 4D EGB gravity coupled to nonlinear electrodynamics, thus leading to the possibility of directly testing these black hole models by using astrophysical observations. |
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| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T12:20:25Z |
| publishDate | 2022-03-01 |
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| series | Universe |
| spelling | doaj.art-049c3256abb1401a9e9eb9220bf1c7272023-11-30T22:40:56ZengMDPI AGUniverse2218-19972022-03-018318210.3390/universe8030182Optical Features of AdS Black Holes in the Novel 4D Einstein-Gauss-Bonnet Gravity Coupled to Nonlinear ElectrodynamicsKhadije Jafarzade0Mahdi Kord Zangeneh1Francisco S. N. Lobo2Department of Physics, Faculty of Science, University of Mazandaran, Babolsar 47416-95447, IranPhysics Department, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz 61357-43135, IranInstituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências da Universidade de Lisboa, Edifício C8, Campo Grande, PT1749-016 Lisbon, PortugalAn alternative theory of gravity that has attracted much attention recently is the novel four-dimensional Einstein-Gauss-Bonnet (4D EGB) gravity. The theory is rescaled by the Gauss-Bonnet (GB) coupling constant <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>α</mi><mo>→</mo><mi>α</mi><mo>/</mo><mo>(</mo><mi>D</mi><mo>−</mo><mn>4</mn><mo>)</mo></mrow></semantics></math></inline-formula> in <i>D</i> dimensions and redefined as four-dimensional gravity in the limit <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>D</mi><mo>→</mo><mn>4</mn></mrow></semantics></math></inline-formula>. Thus, in this manner, the GB term yields a non-trivial contribution to the gravitational dynamics. In fact, regularized black hole solutions and applications in the novel 4D EGB gravity have also been extensively explored. In this work, motivated by recent astrophysical observations, we present an in-depth study of the optical features of AdS black holes in the novel 4D EGB gravity coupled to exponential nonlinear electrodynamics (NED), such as the shadow geometrical shape, the energy emission rate, the deflection angle and quasinormal modes. Taking into account these dynamic quantities, we investigate the effects on the black hole solution by varying the parameters of the models. More specifically, we show that the variation of the GB and NED parameters, and of the cosmological constant, imprints specific signatures on the optical features of AdS black holes in the novel 4D EGB gravity coupled to nonlinear electrodynamics, thus leading to the possibility of directly testing these black hole models by using astrophysical observations.https://www.mdpi.com/2218-1997/8/3/182black holeshigher-derivative theories of gravityobservational signatures |
| spellingShingle | Khadije Jafarzade Mahdi Kord Zangeneh Francisco S. N. Lobo Optical Features of AdS Black Holes in the Novel 4D Einstein-Gauss-Bonnet Gravity Coupled to Nonlinear Electrodynamics Universe black holes higher-derivative theories of gravity observational signatures |
| title | Optical Features of AdS Black Holes in the Novel 4D Einstein-Gauss-Bonnet Gravity Coupled to Nonlinear Electrodynamics |
| title_full | Optical Features of AdS Black Holes in the Novel 4D Einstein-Gauss-Bonnet Gravity Coupled to Nonlinear Electrodynamics |
| title_fullStr | Optical Features of AdS Black Holes in the Novel 4D Einstein-Gauss-Bonnet Gravity Coupled to Nonlinear Electrodynamics |
| title_full_unstemmed | Optical Features of AdS Black Holes in the Novel 4D Einstein-Gauss-Bonnet Gravity Coupled to Nonlinear Electrodynamics |
| title_short | Optical Features of AdS Black Holes in the Novel 4D Einstein-Gauss-Bonnet Gravity Coupled to Nonlinear Electrodynamics |
| title_sort | optical features of ads black holes in the novel 4d einstein gauss bonnet gravity coupled to nonlinear electrodynamics |
| topic | black holes higher-derivative theories of gravity observational signatures |
| url | https://www.mdpi.com/2218-1997/8/3/182 |
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