3 papers
astro-ph.CO2026
Blue-tilted Runnings and the JWST Early Galaxy Tension
Mikage U. Kobayashi, Gen Chiaki, Kazutaka Kimura +4
The recent James Webb Space Telescope (JWST) observations reported the unexpectedly large abundance of massive galaxies with stellar masses of at high reds…
astro-ph.GA2025
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…
gr-qc2025
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…