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Stellar Velocity Dispersion of a Massive Quenching Galaxy at z = 4.01

Stellar Velocity Dispersion of a Massive Quenching Galaxy at z = 4.01

Abstract We present the first stellar velocity dispersion measurement of a massive quenching galaxy at z = 4. The galaxy is first identified as a massive z ≥ 4 galaxy with suppressed star formation from photometric redshifts based on deep multiband data. A follow-up spectroscopic observation with MOSFIRE on Keck …