491 citations · 984 across the 11 of their papers we have counts for
11 papers
Blue-tilted spectral running and the JWST early galaxy tension
Mikage U. Kobayashi, Gen Chiaki, Kazutaka Kimura +4
Recently, the James Webb Space Telescope (JWST) collaboration has found the unexpectedly large abundance of massive galaxies with stellar masses of at high…
Massive Black Hole Seed Formation in Strong X-ray Environments at High Redshift
Kazutaka Kimura, Kohei Inayoshi, Kazuyuki Omukai
Direct collapse of pristine gas in early galaxies is a promissing pathway for forming supermassive black holes (BHs) powering active galactic nuclei (AGNs) at the epoch of reioniza…
The Impact of Stellar Radiative Feedback on Formation of Young Massive Clusters via Fast HI Gas Collisions
Ryunosuke Maeda, Tsuyoshi Inoue, Kazuyuki Omukai +2
Young massive clusters (YMCs) are dense aggregates of young stars and are often speculated as potential precursors to globular clusters. However, the formation mechanism of massive…
First star formation in extremely early epochs
Mana Ito, Kazuyuki Omukai
First stars play crucial roles in development of the universe, influencing events like cosmic reionization and the chemical enrichment. While first stars are conventionally thought…
Stability of relativistic tidal response against small potential modification
Takuya Katagiri, Hiroyuki Nakano, Kazuyuki Omukai
The tidal response of compact objects in an inspiraling binary system is measured by a set of tidal Love and dissipation numbers imprinted in the gravitational waveforms. While a f…
Vanishing Love of Black Holes in General Relativity: From Spacetime Conformal Symmetry of a Two-dimensional Reduced Geometry
Takuya Katagiri, Masashi Kimura, Hiroyuki Nakano +1
We study the underlying structure of the vanishing of the Love numbers of both Schwarzschild and Kerr black holes in terms of spacetime conformal symmetry in a unified manner for t…