In IllustrisTNG-100, the magnitude gap in fossil structures indicates no recent massive accretion but both fossil and non-fossil systems show similar intermediate levels of dynamical relaxation.
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Something green beneath the surface: The dynamical nature of Fossil Structures in IllustrisTNG-100
In IllustrisTNG-100, the magnitude gap in fossil structures indicates no recent massive accretion but both fossil and non-fossil systems show similar intermediate levels of dynamical relaxation.