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Physical Cosmology

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3 domain-specific abstractions whose origin domain is Physical Cosmology.

  • Dark energy — The name for a smoothly distributed cosmological component or modification of gravity invoked to explain the observed late-time acceleration of cosmic expansion.
  • Mészáros effect — The suppression of subhorizon cold-dark-matter perturbation growth during radiation domination, followed by enhanced growth after matter–radiation equality.
  • Weyl curvature hypothesis — Penrose's cosmological proposal that the initial singularity had vanishing or highly constrained Weyl curvature, explaining low gravitational entropy and the thermodynamic arrow of time.