Extended Data Fig. 2: The luminosity-weighted stellar age versus the mass of red sequence cluster member galaxies.
From: Spectroscopic confirmation of a mature galaxy cluster at a redshift of 2
Posterior distributions in mean stellar age (tw) and log stellar mass for the 19 ‘gold’ members of the cluster red sequence. Only SED models assuming AV = 0.0 are shown. Contours enclose 67% of the posterior probability for each galaxy. The horizontal dashed line indicates an age of 3.35 Gyr, that is, the age of the Universe at a redshift z = 1.98 in the assumed cosmological model.