Research

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Research

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Recent research topics

• Motion of charged shells around a black hole (Yamazaki, Nakao)
• Numerical simulation of a system with a Kaluza-Klein bubble and a black string (Yoshino)
• Behavior of a charged scalar field around a black hole immersed in uniform magnetic field (Onishi, Yoshino)
• Calculation of electrovacuum magnetosphere around a Kerr black hole (Endo, Ishihara)
• Blandford-Znajek process and electrification of a black hole (Matsuo, Nakao, Yoshino, Ishihara, Ueda, Sueto)
• Spacetime structures of evaporating regular black holes (Sueto, Yoshino)
• Construction of exact solutions of Einstein equations using a contact manifold (Ishihara, Morisawa)
• Construction of exact solutions of Einstein equations using a Sasakian quasi-Killing spinors (S. Matsuno)
• Hawking radiation in the gravitational collapse without black hole formation (Okabayashi, Nakao)
• Black hole shadows in dynamical situations (Asaka, Okabayashi, Nakao)
• Signals of electromagnetic waves/neutrinos in strong gravity region in the gravitationa collapse (Nakao, Yoshino)
• Proposal of a new concept (DTTS) that characterizes the strong gravity region (Yoshino)
• Behavior of a massive scalar field (an axion field) around a rotating black hole (Yoshino)
• Theoretical calculation of gravitational waves from black hole binaries (Sago)
• Gravitational waves from black hole mimickers without event horizons (Sago)
• Soliton solutions and their stability and dynamics of some fields (Ogawa, Endo, Kokubo, Okuya, Ishihara)
• Hawking radiaton of Kaluza-Klein black holes in the tunneling picture (K. Matsuno)
• Detection of gravitational waves with ultralow frequency with pulsar timing arrays (Kato)
• Analogue black holes in superfluids (Sata, Ishihara)

Doctor theses