67 citations · 258 across the 8 of their papers we have counts for
8 papers
Dynamical von Zeipel-Lidov-Kozai Oscillations of a Binary on a Spherical Orbit around a Rotating Supermassive Black Hole
Kei-ichi Maeda, Hirotada Okawa
We study the dynamics of a binary system orbiting a rotating supermassive black hole (SMBH). Using Fermi-Walker transport, we construct a local inertial reference frame in the Kerr…
Einstein Cluster as Central Spiky Distribution of Galactic Dark Matter
Kei-ichi Maeda, Vitor Cardoso, Anzhong Wang
Using the Einstein cluster models, we construct a fully relativistic, spherically symmetric, spiky structure of matter distribution near a supermassive black hole. We introduce and…
Black hole thermodynamics in generalized Proca theories
Masato Minamitsuji, Kei-ichi Maeda
We investigate thermodynamics of static and spherically symmetric black holes (BHs) in generalized Proca (GP) theories by applying the Iyer-Wald prescription. BH solutions in GP th…
Oscillating Bianchi IX Universe in Horava-Lifshitz Gravity
Yosuke Misonoh, Kei-ichi Maeda, Tsutomu Kobayashi
We study a vacuum Bianchi IX universe in the context of Hořava-Lifshitz (HL) gravity. In particular, we focus on the classical dynamics of the universe and analyze how anisotropy c…
Preheating with non-minimally coupled scalar fields in higher-curvature inflation models
S. Tsujikawa, K. Maeda, T. Torii
In higher-curvature inflation models (), we study a parametric preheating of a scalar field coupled non-minimally to a spacetime curvature (). In the cas…
Cosmic Colored Black Holes
Takashi Torii, Kei-ichi Maeda, Takashi Tachizawa
We present spherically symmetric static solutions (a particle-like solution and a black hole solution) in the Einstein-Yang-Mills system with a cosmological constant.Although their…
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…