Stellar Kinematics of z~2 Galaxies and the Inside-Out Growth of Quiescent Galaxies

Understand

Using stellar kinematics measurements, we investigate the growth of massive, quiescent galaxies from z~2 to today.

• We present X-Shooter spectra from the UV to NIR and dynamical mass measurements of 5 quiescent massive (>10^11 Msun) galaxies at z~2.
• This triples the sample of z>1.5 galaxies with well constrained (dsigma <100 km/s) velocity dispersion measurements.
• From spectral population synthesis modeling we find that these galaxies have stellar ages that range from 0.5-2 Gyr, with no signs of ongoing star formation.