Dark Matter in Disequilibrium: The Local Velocity Distribution from SDSS-Gaia

6 Jul 2018Lina NecibMariangela LisantiVasily Belokurov

We use the distribution of accreted stars in SDSS-Gaia DR2 to demonstrate that the local dark matter halo may not be in equilibrium and that a non-trivial fraction is in substructure. Using a mixture likelihood analysis, we separate the contributions of an old, isotropic stellar halo and a younger anisotropic population... (read more)

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