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13 papers · 2 filters
Naked singularities and quantum gravity
Tomohiro Harada, Hideo Iguchi, Ken-ichi Nakao +3
There are known models of spherical gravitational collapse in which the collapse ends in a naked shell-focusing singularity for some initial data. If a massless scalar field is qua…
Gravitational waves from a spinning particle scattered by a relativistic star: Axial mode case
Kazuhiro Tominaga, Motoyuki Saijo, Kei-ichi Maeda
We study gravitational waves from a spinning test particle scattered by a relativistic star using a perturbation method. The present analysis is restricted to axial modes. By calcu…
Hyperbolic formulations and numerical relativity II: Asymptotically constrained systems of the Einstein equations
Gen Yoneda, Hisa-aki Shinkai
We study asymptotically constrained systems for numerical integration of the Einstein equations, which are intended to be robust against perturbative errors for the free evolution…
Estimating Hawking radiation for exotic black holes
Takashi Tamaki, Kei-ichi Maeda
We study about an approximation method of the Hawking radiation. We analyze an massless scalar field in exotic black hole backgrounds models which have peculiar properties in black…
Birth of timelike naked singularity
H. Kudoh, T. Harada, H. Iguchi
We investigate the causal structure of the Harada-Iguchi-Nakao (HIN)'s exact solution in detail, which describes the dynamical formation of naked singularity in the collapse of a r…
Response of Interferometric Detectors to Scalar Gravitational Waves
Ken-ichi Nakao, Tomohiro Harada, Masaru Shibata +2
We rigorously analyze the frequency response functions and antenna sensitivity patterns of three types of interferometric detectors to scalar mode of gravitational waves which is p…