COLLOQUIUM Koki Kakiichi, University of Copenhagen (DAWN)

Journey to the Universe in 3D: Quest to Distant Galaxies, Black Holes, and Reionization

Mapping the large-scale structures of the distribution of galaxies and the intergalactic medium (IGM)—'the art of cosmography'—has been instrumental in advancing our understanding of the Universe. The James Webb Space Telescope (JWST) has revolutionized the study of distant galaxies, supermassive black holes (SMBHs), and cosmic reionization. However, the entire structure of the 'cosmic web' remains unseen, and the physical origins of the distant objects are still yet to be determined.  In this talk, I will present our journey towards mapping the entire cosmic web and the quest to understand the origins of early galaxies, SMBHs, and reionization. I will start by highlighting some of the recent progress made with JWST, then present our JWST result on understanding the role of galaxies and AGN during reionization. I will also introduce an overview of our new Cycle-3 JWST program, envisioning to conduct a wide-field spectroscopic survey from the epoch of cosmic dawn to the present day. I will conclude by discussing the prospects of mapping the entire structures in the Universe through the combination of JWST, Subaru/Hyper-SuprimeCam + Prime-Focus Spectrograph, and Euclid in the near future, as well as with the ELT, to better understand the emergence of the first cosmic structures in the first billion years of the Universe.

Talk in presence and via Zoom:

https://uni-hamburg.zoom.us/j/66006535328?pwd=aGkrSjJIYmZjK0VpYlpGL0ZrdHg2UT09