In the Magneticum simulation, a more circular satellite orbit produces a stream where visible stars come mostly from the progenitor core while a radial orbit produces shells that preserve the original radial ordering of stars from the satellite.
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Stream on: Evolution of stellar shells and streams - A case study
In the Magneticum simulation, a more circular satellite orbit produces a stream where visible stars come mostly from the progenitor core while a radial orbit produces shells that preserve the original radial ordering of stars from the satellite.