= Scott Tremaine
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{tag=Physicist}
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<Scott Tremaine> coauthored a phase-space constraint on fermionic <dark matter>. The analysis connects the phase-space <density> needed in a <galaxy> with an upper bound arising from the microscopic statistics of a proposed particle.<Dynamical Role of Light Neutral Leptons in Cosmology by Scott Tremaine and James Edward Gunn>[Fermion occupancy and galactic phase-space constraint]{ref}
The result shows why matching a total gravitational <mass> is not sufficient for a viable matter model. The candidate must also be able to occupy the measured spatial and <velocity> distribution. Both the dynamical inference and assumptions about the particle distribution enter the test.
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