A study of dark matter halos and gas properties in clusters of galaxies from ROSAT data

  title={A study of dark matter halos and gas properties in clusters of galaxies from ROSAT data},
  author={Ricardo Demarco and Fr{\'e}d{\'e}ric Magnard and Florence Durret and I M{\'a}rquez},
  journal={Astronomy and Astrophysics},
Self-gravitating systems such as elliptical galaxies appear to have a constant integrated specific entropy and obey a scaling law relating their potential energy to their mass. These properties can be interpreted as due to the physical processes involved in the formation and evolution of these structures. Dark matter halos obtained through numerical simulations have also been found to obey a scaling law relating their potential energy to their mass with the same slope as for ellipticals, and… 
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