Research field (1)：
Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research keywords (4)：
Cosmology
, Astrophysics
, Black Holes
, Relativity
Research theme for competitive and other funds (2)：
2022 - 2027 black holes in gravity theories beyond general relativity
2020 - 2022 black hole perturbation and gravitational waves in modified gravity theories
Papers (55)：
Keisuke Nakashi, Masashi Kimura, Hayato Motohashi, Kazufumi Takahashi. Black hole perturbations in higher-order scalar-tensor theories: initial value problem and dynamical stability. Classical and Quantum Gravity. 2022. 39. 17. 175003-175003
Yasuyuki Hatsuda, Masashi Kimura. Spectral Problems for Quasinormal Modes of Black Holes. Universe. 2021. 7. 12. 476-476
Masashi Kimura, Tomohiro Harada, Atsushi Naruko, Kenji Toma. Backreaction of mass and angular momentum accretion on black holes: General formulation of metric perturbations and application to the Blandford-Znajek process. Progress of Theoretical and Experimental Physics. 2021. 2021. 9
Katagiri, Takuya, Kimura, Masashi. Revisiting the Aretakis constants and instability in two-dimensional anti-de Sitter spacetimes. Phys.Rev.D. 2021. 103. 6. 064011-064011
Nakashi, Keisuke, Kimura, Masashi. Towards rotating non-circular black holes in string-inspired gravity. Phys.Rev.D. 2020. 102. 8. 084021-084021
