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Inflation and the dwarf galaxy problem
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Inflation and the dwarf galaxy problem
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Cosmological N-body simulations with scale-invariant initial perturbations show too many virialized objects of dwarf-galaxy masses in a typical galactic halo in contradiction to observation and stability of galactic discs. We present a model of double hybrid inflation which predicts density fluctuations with a small-scale cutoff to account for the absence of these objects in observations.
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Cited by 1 Pith paper
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A lower bound on primordial power spectrum from halo substructure
Galactic halo substructure requires primordial curvature perturbations of amplitude ≳10^-9 at wavenumbers 10–30 Mpc^-1.
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