Inflation and the dwarf galaxy problem

2000/09/08 by Jun’ichi Yokoyama, Jun'ichi Yokoyama · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph

paper · pdf · doi:10.1103/physrevd.62.123509

published as Phys.Rev.D62:123509,2000 · 8 pages, no figure

arxiv created 2000/09/08 · openalex publication_date 2000/11/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Cosmological N\ensuremath-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.

Citations

• A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems
• Particle Physics Models of Inflation and the Cosmological Density Perturbation

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