Spectroscopic Confirmation of a Massive Protocluster with Two Substructures at $z\simeq 3.1$

Michael J. Nicandro Rosenthal, Amy J. Barger, Lennox L. Cowie +3

We present the results of a Keck and NOEMA spectroscopic survey of 507 galaxies, where we confirm the presence of two massive overdensities at $z=3.090-3.110$ and $z = 3.133 -…