Dark Matter – University of Copenhagen

DARK > Research > Dark Matter

Merging Galaxy Cluster Abell 520 (NASA)

Dark matter dominates the formation of gross structures in the Universe, from galaxies to superclusters.

While we do not know the composition of the dark matter because of a lack of direct detection to date, it is also notable that we still do not know the overall features of the structures that dark matter creates-the radial mass profile is not precisely known, and the velocity anisotropy profile, which was a major focus of our phenomenological research during the past three years has been measured. The physics underlying the profiles of dark‐matter dominated structures is certainly not understood yet, with major discrepancies remaining between simulations and observations, as well as between dwarf galaxies, galaxies and clusters of galaxies.

At DARK, we investigate how the dark matter radial density profile affects or controls the gas density and temperature profiles in these objects. We examine if changes in the nature of the dark‐matter particle are responsible for scale‐related discrepancies in the dark‐matter profile, and what effect changes in the baryonic matter have on the dark‐matter profile as galaxies and galaxy clusters evolve over cosmic time.

Current work by researchers at DARK:

  • Dark matter particle properties
  • Characteristics of dark matter structures
  • Understanding the origin of hot gas properties
  • Cosmological simulations of galaxy formation
  • Cold Dark Matter model
  • Testing alternative dark matter models
  • Galaxy clusters as cosmological probes
  • Dark matter annihilation
  • Lambda cold dark matter problems at small scales
  • Star formation history in Local Group satellite galaxies
  • Role of baryonic feedback in shaping the dark matter density profile

Active grant-funded projects:

  • The impact of collisional dark matter in galaxy formation: Time for
    a paradigm shift? (PI, Jesús Zavala Franco)