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1 results

  • 17 - “An excess in moderation”

  • from Part IV - Moderate unorthodoxies: The CMB with the Big Bang
  • Slobodan Perovic, University of Belgrade, Milan M. Cirkovic, Astronomical Observatory of Belgrade, Serbia
  • Book:
    The Cosmic Microwave Background
    Published online:
    09 July 2024
    Print publication:
    27 June 2024, pp 101-102

  • Summary

    In the early 1990s, Gnedin and Ostriker developed a framework for explaining the CMB that was not tied to any particular model. It was predicated on questioning the Hot Big Bang assumptions, especially the ad hoc assumption of dark nonbaryonic matter, while it opted for more “natural” regular astrophysical explanations and observed properties. Gnedin and Ostriker devised a complicated scheme of early interactions of baryonic matter and plasma based on regular physics, with the CMB its expected product. Yet this move required hypothesizing hidden baryonic matter, in galaxies or otherwise, and this had its own epistemic challenges. The chapter notes that this approach was abandoned with the dark energy postulation of the late 1990s.