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5 papers · 2 filters
Bound on Lyapunov exponent in Kerr-Newman-de Sitter black holes by a charged particle
Junsu Park, Bogeun Gwak
We investigate the bound on the Lyapunov exponents by a charged particle in Kerr-Newman-de Sitter black holes using analytic and numerical methods. We determine whether the Lyapuno…
Universality on thermodynamic relation with corrections in de Sitter black holes
Junbeom Ko, Bogeun Gwak
We herein investigate the universal relation proposed by Goon and Penco in de Sitter black holes with electric charge or angular momentum. Our analysis focuses on the cosmological…
Scalar quasi-normal modes of accelerating Kerr-Newman-AdS black holes
Julián Barragán Amado, Bogeun Gwak
We study linear scalar perturbations of slowly accelerating Kerr-Newman-anti-de Sitter black holes using the method of isomonodromic deformations. The conformally coupled Klein-Gor…
Absorption cross section in gravity's rainbow from confluent Heun equation
Kihong Kwon, Julián Barragán Amado, Bogeun Gwak
We investigate the scattering of a massless scalar field by a charged non-rotating black hole in the presence of gravity's rainbow. Using the connection coefficients of the conflue…
Metric fluctuations in higher-dimensional black holes
Hyewon Han, Bogeun Gwak
We investigated the impact of metric fluctuations on the higher-dimensional black hole geometry. We generalized the four-dimensional model to higher dimensions to treat quantum vac…