Dark matter distribution in the Coma cluster from galaxy kinematics: breaking the mass-anisotropy degeneracy

  title={Dark matter distribution in the Coma cluster from galaxy kinematics: breaking the mass-anisotropy degeneracy},
  author={Ewa L. Lokas and Gary A Mamon},
  journal={Monthly Notices of the Royal Astronomical Society},
  • E. Lokas, G. Mamon
  • Published 2003
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We study velocity moments of elliptical galaxies in the Coma cluster using Jeans equations. The dark matter distribution in the cluster is modelled by a generalized formula based upon the results of cosmological N-body simulations. Its inner slope (cuspy or flat), concentration and mass within the virial radius are kept as free parameters, as well as the velocity anisotropy, assumed independent of position. We show that the study of line-of-sight velocity dispersion alone does not allow us to… Expand

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