Inflation and the dwarf galaxy problem

Abstract

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.

8 pages, no figure

References in corpus (6)

• Dark Matter Substructure in Galactic Halos
• The dearth of halo dwarf galaxies: is there power on short scales?
• Suppressing Linear Power on Dwarf Galaxy Halo Scales
• Initial conditions for hybrid inflation
• Double Inflation in Supergravity and the Large Scale Structure
• Double inflation in supergravity and the primordial black hole formation

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• Primordial Black Holes in an Accelerating Universe
• Nonlinear growth of structure in cosmologies with damped matter fluctuations
• Structure Formation with Two Periods of Inflation: Beyond PLaIn $\Lambda$CDM
• Enhanced spectrum of primordial perturbations, galaxy formation and small scale structure
• N-body simulations of structure formation in thermal inflation cosmologies
• Warm and Cold Dark Matter in Bouncing Universe