A population of faint, old, and massive quiescent galaxies at $$3<z<4$$ 3 < z < 4 revealed by JWST NIRSpec Spectroscopy by Themiya Nanayakkara, Karl Glazebrook, Colin Jacobs, Lalitwadee Kawinwanichakij, Corentin Schreiber, Gabriel Brammer, James Esdaile, Glenn G. Kacprzak, Ivo Labbe, Claudia Lagos, Danilo Marchesini, Z. Cemile Marsan, Pascal A. Oesch, Casey Papovich, Rhea-Silvia Remus, Kim-Vy H. Tran

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