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Title: CMB spectral distortions from cooling macroscopic dark matter

Journal Article · · Physical Review. D.
 [1];  [2];  [3];  [3];  [4]
  1. Case Western Reserve Univ., Cleveland, OH (United States); DOE/OSTI
  2. Case Western Reserve Univ., Cleveland, OH (United States); Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
  3. Case Western Reserve Univ., Cleveland, OH (United States)
  4. Case Western Reserve Univ., Cleveland, OH (United States); Univ. College London (United Kingdom)

We propose a new mechanism by which dark matter (DM) can affect the early and late Universe. The hot interior of a macroscopic DM, or macro, can behave as a heat reservoir so that energetic photons and neutrinos are emitted from its surface and interior, respectively. In this paper, we focus on the spectral distortions (SDs) of the cosmic microwave background before recombination. Here, 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 a fixed density. In our work, we find that, for macros of this type that constitute 100% of the dark matter, the μ and y distortions can be near or above the detection threshold for typical proposed next-generation experiments such as PIXIE.

Research Organization:
Case Western Reserve Univ., Cleveland, OH (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0009946
OSTI ID:
1611264
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 2 Vol. 99; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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