742 citations · 3.9k across the 94 of their papers we have counts for
94 papers
Perturbative quasinormal mode frequencies
Yasuyuki Hatsuda, Masashi Kimura
We often encounter a situation that black hole solutions can be regarded as continuous deformations of simpler ones, or modify general relativity by continuous parameters. We devel…
Vanishing Love of Black Holes in General Relativity: From Spacetime Conformal Symmetry of a Two-dimensional Reduced Geometry
Takuya Katagiri, Masashi Kimura, Hiroyuki Nakano +1
We study the underlying structure of the vanishing of the Love numbers of both Schwarzschild and Kerr black holes in terms of spacetime conformal symmetry in a unified manner for t…
Ladder operators and quasinormal modes in Bañados-Teitelboim-Zanelli black holes
Takuya Katagiri, Masashi Kimura
We study quasinormal modes (QNMs) of massive Klein-Gordon fields in static Bañados-Teitelboim-Zanelli (BTZ) black holes in terms of ladder operators constructed from spacetime conf…
Dynamical photon sphere and time evolving shadow around black holes with temporal accretion
Yasutaka Koga, Nobuyuki Asaka, Masashi Kimura +1
A photon sphere is known as the geometrical structure shaping a black hole shadow. The mechanism is well understood for static or stationary black hole spacetimes such as the Schwa…
The Aretakis constants and instability in general spherically symmetric extremal black hole spacetimes: higher multipole modes, late-time tails, and geometrical meanings
Takuya Katagiri, Masashi Kimura
We study late-time behaviors of massive scalar fields in general static and spherically symmetric extremal black hole spacetimes in arbitrary dimensions. We show the existence of c…
Spectral Problems for Quasinormal Modes of Black Holes
Yasuyuki Hatsuda, Masashi Kimura
This is an unconventional review article on spectral problems in black hole perturbation theory. Our purpose is to explain how to apply various known techniques in quantum mechanic…