Characterizing Galaxy Clusters with Gravitational Potential

  title={Characterizing Galaxy Clusters with Gravitational Potential},
  author={Erwin T Lau},
  journal={The Astrophysical Journal},
  • E. Lau
  • Published 11 September 2010
  • Physics
  • The Astrophysical Journal
We propose a simple estimator for the gravitational potential of cluster-size halos using the temperature and density profiles of the intracluster gas based on the assumptions of hydrostatic equilibrium and spherical symmetry. Using high-resolution cosmological simulations of galaxy clusters, we show that the scaling relation between this estimator and the gravitational potential has a small intrinsic scatter of similar to 8%-15%, and it is insensitive to baryon physics outside the cluster core… Expand

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