Zobrazeno 1 - 10
of 1 097
pro vyhledávání: '"Kimura, Masashi"'
Publikováno v:
Physical Review D, Vol. 110, No. 2, 024015 (2024)
We investigate the parametrized black hole quasinormal ringdown formalism, which is a robust framework used to analyze quasinormal modes in systems that closely resemble general relativity, paying particular attention to the higher overtones. We find
Externí odkaz:
http://arxiv.org/abs/2404.09672
We investigate black holes and gravitational perturbations when both the scalar Gauss-Bonnet and dynamical Chern-Simons gravity sectors coexist in addition to the Einstein-Hilbert term, and both sectors are coupled to a single canonically normalized
Externí odkaz:
http://arxiv.org/abs/2404.07039
Publikováno v:
Phys. Rev. D109, no.2, 024034 (2024)
We study odd-parity perturbations about static and spherically symmetric black hole solutions with a linearly time-dependent scalar field in higher-order scalar-tensor theories. In particular, we consider stealth Schwarzschild and stealth Schwarzschi
Externí odkaz:
http://arxiv.org/abs/2310.09839
Autor:
Hatsuda, Yasuyuki, Kimura, Masashi
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 develop a general framework to compute high-order perturbative corrections
Externí odkaz:
http://arxiv.org/abs/2307.16626
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 the static spin-$s$ fields. The perturbations can be reduced with the h
Externí odkaz:
http://arxiv.org/abs/2209.10469
Autor:
Katagiri, Takuya, Kimura, Masashi
We study quasinormal modes (QNMs) of massive Klein-Gordon fields in static Ba\~{n}ados-Teitelboim-Zanelli (BTZ) black holes in terms of ladder operators constructed from spacetime conformal symmetries. Because the BTZ spacetime is locally isometric t
Externí odkaz:
http://arxiv.org/abs/2205.15610
Publikováno v:
Class. Quant. Grav. 39 (2022) no.17, 175003
We propose a physically sensible formulation of initial value problem for black hole perturbations in higher-order scalar-tensor theories. As a first application, we study monopole perturbations around stealth Schwarzschild solutions in a shift- and
Externí odkaz:
http://arxiv.org/abs/2204.05054
Publikováno v:
Phys. Rev. D 105, 104040 (2022)
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 Schwarzschild and the Kerr spacetimes. In this paper, we investigate and ex
Externí odkaz:
http://arxiv.org/abs/2202.00201
Autor:
Katagiri, Takuya, Kimura, Masashi
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 conserved quantities on the extremal black hole horizons for specific m
Externí odkaz:
http://arxiv.org/abs/2112.09832
Autor:
Hatsuda, Yasuyuki, Kimura, Masashi
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 mechanics to such spectral problems. The article includes analytical/numerical
Externí odkaz:
http://arxiv.org/abs/2111.15197