Importance of Cluster Structural Evolution in Using X-Ray and Sunyaev-Zeldovich Effect Galaxy Cluster Surveys to Study Dark Energy

  title={Importance of Cluster Structural Evolution in Using X-Ray and Sunyaev-Zeldovich Effect Galaxy Cluster Surveys to Study Dark Energy},
  author={Subhabrata Majumdar and Joseph J. Mohr},
  journal={The Astrophysical Journal},
We examine the prospects for measuring the dark energy equation-of-state parameter w within the context of the still uncertain redshift evolution of galaxy cluster structure. We show that for a particular X-ray survey (Sunyaev-Zeldovich effect [SZE] survey), the constraints on w degrade by roughly a factor of 3 (factor of 2) when one accounts for the possibility of nonstandard cluster evolution. With follow-up measurements of a cosmology-independent, masslike quantity it is possible to measure… Expand

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