Old and dark-accreted dark matter fits a Maxwell-Boltzmann shape, while recent massive merger debris can be traced by boosted stellar kinematics, yielding a Milky Way speed distribution whose high-speed tail is ~20% suppressed relative to the standard halo model.
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How to Build an Empirical Speed Distribution for Dark Matter in the Solar Neighborhood
Old and dark-accreted dark matter fits a Maxwell-Boltzmann shape, while recent massive merger debris can be traced by boosted stellar kinematics, yielding a Milky Way speed distribution whose high-speed tail is ~20% suppressed relative to the standard halo model.