Breaking Cosmological Degeneracies in Galaxy Cluster Surveys with a Physical Model of Cluster Structure

  title={Breaking Cosmological Degeneracies in Galaxy Cluster Surveys with a Physical Model of Cluster Structure},
  author={Joshua Daniel Younger and Zolt{\'a}n Haiman and Greg L. Bryan and Sheng Wang Columbia Astrophysics Lab Department of Astronomy and Columbia University Department of Physics and Columbia University Brookhaven National Laboratory},
  journal={The Astrophysical Journal},
It has been shown that in an idealized galaxy cluster survey, containing � 10,000 clusters, statistical errors on dark energy and other cosmological parameters will be at the percent level. Furthermore, through “self–calibration”, parameters describing the mass–observable relation and cosmology can be simultaneously determined, though at a loss in accuracy by about an order of magnitude. Here we examine an alternative approach to self–calibration, in which a parametrized ab–initio physical… 
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