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CMB Spectral Distortions from Cooling Macroscopic Dark Matter

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arxiv 1804.08601 v4 pith:H7KTB5GE submitted 2018-04-23 astro-ph.CO astro-ph.GAhep-ph

classification astro-ph.COastro-ph.GAhep-ph
keywords distortionsdarkmacrosmatterspectralcoolingdensityfind
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abstract

We propose a new mechanism by which dark matter (DM) can affect the early universe. The hot interior of a macroscopic DM, or macro, can behave as a heat reservoir so that energetic photons are emitted from its surface. This results in spectral distortions (SDs) of the cosmic microwave background. The SDs depend on the density and the cooling processes of the interior, and the surface composition of the Macros. We use neutron stars as a model for nuclear-density Macros and find that the spectral distortions are mass-independent for fixed density. In our work, we find that, for Macros of this type that constitute 100$\%$ of the dark matter, the $\mu$ and $y$ distortions can be above detection threshold for typical proposed next-generation experiments such as PIXIE.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The Glow of Axion Quark Nugget Dark Matter: (IV) CMB Spectral and Anisotropy Signatures

    astro-ph.CO 2025-12 conditional novelty 5.0 of 10

    Axion quark nugget dark matter would create a μ-type CMB spectral distortion near 6×10⁻⁸ with y near 2×10⁻⁹, detectable by proposed missions, while leaving CMB anisotropies essentially unchanged.

  2. Microwave Spectro-Polarimetry of Matter and Radiation across Space and Time

    astro-ph.CO 2019-09 unverdicted novelty 4.0 of 10

    This white paper proposes a large space mission combining a polarized imager, a filter-bank spectrometer, and absolute spectrometers to map the microwave sky from 10 to 2000 GHz and probe cosmology across cosmic time.

  3. New Horizons in Cosmology with Spectral Distortions of the Cosmic Microwave Background

    astro-ph.CO 2019-09 unverdicted novelty 3.0 of 10

    A white paper advocating for a CMB spectral distortion mission to detect predicted mu, y, and recombination signals and probe inflation, dark matter, and particle physics.

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