Explaining the dark matter small-scale crisis with spectral distortions

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This project aims to explain the nature of dark matter and provide a solution to the so-called small-scale crisis. The "cold dark matter" model provides an excellent fit to observations of the universe on the largest scales. Yet, it appears to be in conflict with current understanding of how small structures such as dwarf galaxies form. This project expects to determine the distortions to the blackbody spectrum of the cosmic microwave background (CMB) photons due to different solutions to this small-scale crisis. The expected outcome is to open an observational pathway to test these solutions with the future CMB observations. This project will provide significant contribution to both particle physics and astrophysics/astronomy, and will advance Australia’s knowledge base in fundamental science beyond the immediate goal of clarifying small-scale problems of cold dark matter.