Research

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history

Chasing Cosmic History: My research focuses on the distant universe. Since light takes time to travel, the farther we look, the further back in time we see. Ever since humanity first looked through a telescope a few hundred years ago, our view of the universe has rapidly expanded, and we’ve continued weaving a story that spans from the distant past to the present. This endeavor addresses some of the most fundamental questions — where did we come from, and where are we going — while also seeking to answer simpler, yet profound, curiosities: what did the first light, the first stars, and the first black holes in the universe actually look like?

To pursue these questions, our group conducts extensive multi-wavelength observations using some of the largest telescopes around the world. We focus on four key observational probes — galaxies, stars and star clusters, black holes, and stellar explosions — aiming to comprehensively understand the formation and evolution of early galaxies through the properties of gas, stars, and dust.

Project Spotlights

VENUS

VENUS

VENUS is the second largest JWST program, a multi-epoch treasury survey led by Seiji Fujimoto (PI) and Dan Coe (co-PI), targeting 60 massive galaxy clusters to capture the faintest galaxies, black holes, and supernovae at z~4–20 with unprecedented depth and spatial resolution.
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Cosmic Grapes

Cosmic Grapes

The Cosmic Grapes is a remarkable lensed galaxy system at z=6.07, revealed by deep JWST, ALMA, and VLT/MUSE follow-up, allowing us to spatially resolve chemical enrichment, mass, and dynamics on <10 pc scales at cosmic dawn.
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GNz7q

GNz7q

GNz7q is a rare hybrid system discovered at z=7.189 that bridges galaxies and quasars, providing the first glimpse of a growing black hole embedded in a dusty galaxy less than 800 million years after the Big Bang.
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GLIMPSE-D

GLIMPSE-"D"

The GLIMPSE-"D" is the deep G395M follow-up program targeting a lensing cluster field, most deeply observed so far by JWST and HST to uncover the faintest and/or most distant galaxies at z>6, offering a new window onto the cosmic dawn.
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