S18B0096abst
S18B0096
The current framework of the cold dark matter universe predicts that matter assembles in filaments, and at the intersection of which galaxies form and evolve. Directly imaging this intergalactic medium (IGM) and circumgalactic medium (CGM) to test this fundamental prediction is a major goal of observational astronomy. Recently we have found a convincing candidate of such “cosmic web” in the surroundings of a z∼3.09 proto-cluster core. Combining Subaru narrow-band Lyα image with ALMA and Chandra data, we discovered very extended Lyα filaments “illuminated” by numerous starbursts and AGNs. This suggests that we are seeing rapid growth of galaxies and SMBHs, fueled by cold intergalactic gas along the filaments. Using KCWI, we will map a node of the cosmic filament in which 4 starbursts/AGNs are rapidly accumulating their mass. The observations, in synergy with a deep ALMA survey, will provide an unprecedented view of the IGM/CGM and its connection to galaxy growth.
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