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11 papers · 2 filters
Violation of the cosmic no hair conjecture in Einstein-Maxwell-dilaton system
Kengo Maeda, Takashi Torii, Makoto Narita
The cosmic no hair conjecture is tested in the spherically symmetric Einstein-Maxwell-dilaton~(EMD) system with a positive cosmological constant . Firstly, we analytically show…
Petrov types of slowly rotating fluid balls
Gyula Fodor, Zoltán Perjés
Circularly rotating axisymmetric perfect fluid space-times are investigated to second order in the small angular velocity. The conditions of various special Petrov types are solved…
Signature of chaos in gravitational waves from a spinning particle
Shingo Suzuki, Kei-ichi Maeda
A spinning test particle around a Schwarzschild black hole shows a chaotic behavior, if its spin is larger than a critical value. We discuss whether or not some peculiar signature…
Generality of Singularity Avoidance in Superstring Theory: Anisotropic Case
Hiroki Yajima, Kei-ichi Maeda, Hidetoshi Ohkubo
In one-loop string effective action, we study a generality of non-singular cosmological solutions found in the isotropic and homogeneous case. We discuss Bianchi I and IX type spac…
The Einstein Equations on the 3-Brane World
Tetsuya Shiromizu, Kei-ichi Maeda, Misao Sasaki
We carefully investigate the gravitational equations of the brane world, in which all the matter forces except gravity are confined on the 3-brane in a 5-dimensional spacetime with…
The fate of Reissner-Nortström black hole in the Einstein-Yang-Mills-Higgs system
Takashi Tamaki, Kei-ichi Maeda
We study about an evaporating process of black holes in SO(3) Einstein-Yang-Mills-Higgs system. We consider a massless scalar field which couple neither with the Yang-Mills field n…