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We study various phenomena on cosmological scales, both theoretically and observationally, in order to elucidate unknown physical laws and mechanisms in the universe. In particular, we focus on the bending of the path of light (electromagnetic waves) due to general relativistic effects (gravitational lensing) and changes in the energy of light (gravitational redshift effects), and test cosmological models through synergy between theoretical models and observations. In recent years, we have been focusing on observational studies with the ALMA and Subaru telescopes, and are also conducting astronomical research on galaxy evolution in supervoids (large low-density regions), new object searches using deep learning, and the feedback of active galactic nuclei (AGN) on galaxy formation.
Probing the largest-scale structures in the universe
Probing small-scale cosmic structures with gravitational lensing