Stellar halos act as transition regions between bright central galaxies and intracluster light, with strong mass correlations, similar colors that redden over time, and a shrinking metallicity gap from 0.4 dex at z=2 to 0.1 dex today.
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Simulation analysis finds ICL mostly from stripped intermediate-mass galaxies and BCGs from massive mergers, with overlapping but non-identical progenitors and distinct mass fractions, colors, and metallicities.
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Stellar halos of bright central galaxies II: Scaling relations, colors and metallicity evolution with redshift
Stellar halos act as transition regions between bright central galaxies and intracluster light, with strong mass correlations, similar colors that redden over time, and a shrinking metallicity gap from 0.4 dex at z=2 to 0.1 dex today.
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Coevolution of Intracluster Light and Brightest Cluster Galaxies
Simulation analysis finds ICL mostly from stripped intermediate-mass galaxies and BCGs from massive mergers, with overlapping but non-identical progenitors and distinct mass fractions, colors, and metallicities.