Physics

COSMOS2020: Discovery of a protocluster of massive quiescent galaxies at z = 2.77

K. Ito, M. Tanaka, et al.

Discover the fascinating QO-1000, an overdense structure of massive quiescent galaxies at redshift z = 2.77, identified through groundbreaking research by Kei Ito and colleagues. With a 4.2σ overdensity and spectroscopic confirmation of clustered galaxies, this study hints at the evolution of a massive galaxy cluster by z = 0, transitioning from star-forming protoclusters to quenched galaxy clusters.

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