This result is in line with recent predictions from galaxy formation simulations based on minor merger driven mass growth, in which the dark matter fraction within the half-light radius increases with cosmic time. However, establishing the degree of quiescence in high-redshift galaxies is a challenging task. By combining our sample with high-redshift literature data, we find that this evolution of the dynamical to stellar mass ratio continues beyond z ~ 0.7 up to z > 2 as M dyn/M sstarf ~(1 + z) -0.30 ± 0.12, further strengthening the evidence for an increase of M dyn/M sstarf with cosmic time. Understanding the process of quenching is one of the major open questions in galaxy evolution and crucial insights may be obtained by studying quenched galaxies at high redshifts at epochs when the Universe and the galaxies were younger and simpler to model. high redshift is necessary to explain the observed half-mass radius evolution. We study the redshift evolution of the dynamical properties of ~180, 000 massive galaxies from SDSS-III/BOSS combined with a local early-type galaxy sample from SDSS-II in the redshift range 0.1 2σ significance. Intracluster light (ICL) is diffuse light from stars that are gravitationally bound not to individual member galaxies, but to the halo of galaxy clusters. galaxy half-light radii found over the same redshift range.
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