• Cosmology with cluster surveys

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      https://www.ias.ac.in/article/fulltext/pram/063/04/0871-0875

    • Keywords

       

      Cosmology; cosmic microwave background; clusters

    • Abstract

       

      Surveys of clusters of galaxies provide us with a powerful probe of the density and nature of the dark energy. The red-shift distribution of detected clusters is highly sensitive to the dark energy equation of state parameterw. Upcoming Sunyaev-Zel’dovich (SZ) surveys would provide us large yields of clusters to very high red-shifts. Self-calibration of cluster scaling relations, possible for such a huge sample, would be able to constrain systematic biases on mass estimators. Combining cluster red-shift abundance with limited mass follow-up and cluster mass power spectrum can then give constraints onw, as well as onσ8 and ΩM to a few per cents.

    • Author Affiliations

       

      Subhabrata Majumdar1

      1. CITA, University of Toronto, Toronto, ON - M5S 3H8, Canada
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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