290 citations · 290 across the 4 of their papers we have counts for
5 papers
Consistency in the Quantum-Improved Charged Black Holes
Chiang-Mei Chen, Akihiro Ishibashi, Nobuyoshi Ohta
We investigate the consistency in the thermodynamics and the approaches at the equation and action levels for the quantum-improved charged black holes with scale-dependent coupling…
Ringdown waves from hairy black holes
Ariadna Uxue Palomino Ylla, Kosuke Makino, Akane Tanaka +2
We study how quasinormal-mode frequencies may encode information about the effective matter source responsible for black-hole hair. Using the established eikonal correspondence bet…
Ringdown in Vaidya spacetimes: time-dependent frequencies, Penrose limit and time-domain analyses
Chul-Moon Yoo, Masashi Kimura, Akihiro Ishibashi +1
We examine the possible characterization of ringdown waves in a dynamical Vaidya spacetime using the Penrose limit geometry around the dynamical photon sphere. In the case of a sta…
Bianchi-I cosmology with scale dependent and in asymptotically safe gravity
Chiang-Mei Chen, Akihiro Ishibashi, Rituparna Mandal +1
We study anisotropic Bianchi-I cosmology, incorporating quantum gravitational corrections into the Einstein equation through the scale-dependent Newton coupling and cosmological te…
Stability of Higher-Dimensional Schwarzschild Black Holes
Akihiro Ishibashi, Hideo Kodama
We investigate the classical stability of the higher-dimensional Schwarzschild black holes against linear perturbations, in the framework of a gauge-invariant formalism for gravita…