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4 papers · 2 filters
Non-Abelian Black Holes and Catastrophe Theory II: Charged Type
T. Tachizawa, K. Maeda, T. Torii
We reanalyze the gravitating monopole and its black hole solutions in the Einstein-Yang-Mills-Higgs system and we discuss their stabilities from the point of view of catastrophe th…
Non-Abelian Black Holes and Catastrophe Theory I : Neutral Type
Takashi Torii, Kei-ichi Maeda, Takashi Tachizawa
We re-analyze the globally neutral non-Abelian black holes and present a unified picture, classifying them into two types; Type I (black holes with massless non-Abelian field) and…
Finding Principal Null Direction for Numerical Relativists
Laurens Gunnarsen, Hisa-aki Shinkai, Kei-ichi Maeda
We present a new method for finding principal null directions (PNDs). Because our method assumes as input the intrinsic metric and extrinsic curvature of a spacelike hypersurface,…
Generality of Inflation in a Planar Universe
Hisa-aki SHINKAI, Kei-ichi MAEDA
We study a generality of an inflationary scenario by integrating the Einstein equations numerically in a plane-symmetric spacetime. We consider the inhomogeneous spacetimes due to…