Tiny black holes explain galaxy flows and the expansion of the Universe ⚡ экспресс
A large dipole anisotropy in the CMB may point to a macroscopic nature of dark matter in the form of primordial black holes (PBHs). As a dense non-relativistic medium since the radiation era, PBHs create gravitational wells earlier than standard cold dark matter. Simulations up to matter–radiation equality yield systematically higher bulk flows of galaxies compared to ΛCDM, due to early clustering of massive PBHs that accelerate baryons and preserve coherence over hundreds of Mpc. A subpopulation of PBHs with masses of 10^-20–10^-17 M⊙ loses a significant fraction via Hawking radiation, introducing a time-dependent matter density parameter Ω_m' that acts as an additional radiation term in the Friedmann equation. This shrinks the sound horizon at recombination, easing the Hubble tension and affecting the equation-of-state parameter w at low z. These results motivate computations in standard cosmological codes incorporating mass-losing PBHs and an early start to structure evolution.
Dark matter may not be particles but black holes from the Big Bang era. In the early Universe, which was like a swirling batter, they were like heavy lumps—barely moving, they gathered surrounding matter and spun it into the swift galaxy flows astronomers observe today. But there's a twist: the lightest holes, according to Hawking's theory, evaporate, emitting energy. This evaporation gently warms the cosmic 'batter' in its early stages, thereby changing the calculated rate of the Universe's expansion and smoothing out the notorious tension between different measurement methods.
🎯 One such hole weighs as much as an asteroid but is compressed to a point smaller than an atomic nucleus. Its evaporation is so unhurried that over the entire history of the Universe, it would lose only a minuscule fraction of its mass.