The Cold Dark Matter crisis on galactic and subgalactic scales

Abstract

The Cold Dark Matter model describes successfully our Universe on large scales, as has been verified by a wide range of observations. Nevertheless, in the last years, and especially with the advances in numerical simulations, a number of apparent inconsistencies arose between what is observed and what the CDM model predicts on small scales. In this work, the current status of observations on galactic and subgalactic scales is reviewed. Furthermore, theory and observation are brought together in order to reveal the nature of the inconsistencies and, consequently, to reveal their severity. Lastly, the progress towards the resolution of each one of these conflicts is briefly reviewed.

49 pages, 6 figures; revised version-references added

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• Features in Dark Energy Equation of State and Modulations in the Hubble Diagram
• Self-consistent models of cuspy triaxial galaxies with dark matter haloes
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• Perturbations in the interacting vacuum
• Radial Acceleration Relation from Ultra-light Scalar Dark matter
• The M-sigma Relation of Super Massive Black Holes from the Scalar Field Dark Matter
• Analyzing Planar Galactic Halo Distributions with Fuzzy/Cold Dark Matter Models
• Effective Cross Section of Fuzzy Dark Matter Halos
• Preheating and Dark Sector of Universe
• Head-on collisions of fuzzy/cold dark matter subhalos
• Galaxies with Fuzzy Dark Matter
• Bulge formation from SSCs in a responding cuspy dark matter halo