Models of distorted and evolving dark matter haloes

@article{Sanders2020ModelsOD,
  title={Models of distorted and evolving dark matter haloes},
  author={Jason L. Sanders and E. J. Lilley and Eugene Vasiliev and Neil Wyn Evans and Denis Erkal},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020}
}
We investigate the ability of basis function expansions to reproduce the evolution of a Milky Way-like dark matter halo, extracted from a cosmological zoom-in simulation. For each snapshot, the density of the halo is reduced to a basis function expansion, with interpolation used to recreate the evolution between snapshots. The angular variation of the halo density is described by spherical harmonics, and the radial variation either by biorthonormal basis functions adapted to handle truncated… 
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