Stacking analysis of eROSITA observations detects statistically significant X-ray signal from hot gas out to 2 r_200m with a transition at the halo boundary, showing higher gas spread than in IllustrisTNG simulations.
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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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The SRG/eROSITA All-Sky Survey. Detection of shock-heated gas beyond the halo boundary into the accretion region
Stacking analysis of eROSITA observations detects statistically significant X-ray signal from hot gas out to 2 r_200m with a transition at the halo boundary, showing higher gas spread than in IllustrisTNG simulations.
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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.