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Stellar Mass Segregation in Dark Matter Halos
Rapha\"el Errani, Jorge Pe\~narrubia, Matthew G. Walker
https://arxiv.org/abs/2505.22717 https://…

Stellar Mass Segregation in Dark Matter Halos
We study the effect of stellar mass segregation driven by collisional relaxation within the potential well of a smooth dark matter halo. This effect is of particular relevance for old stellar systems with short crossing times, where small collisional perturbations accumulate over many dynamical time scales. We run collisional $N$-body simulations tailored to the ambiguous stellar systems Ursa Major 3/Unions 1, Delve 1 and Eridanus 3, modelling their stellar populations as two-component systems …