Stumbling Over Hubble Tension: How Primordial Black Holes Lose the Race for Dark Matter ✛ ✎ ✦
Original: "Running into tension: primordial black holes from ultra-slow-roll inflation, spectral running, and the Hubble tension"
New data: attempting to explain Hubble tension only exacerbates the problems of inflationary models for primordial black hole formation.
An asteroid-mass primordial black hole (~$10^{-16}$ M☉) would have a radius smaller than a proton, yet weigh as much as a mountain. If such objects make up dark matter, several of these microscopic black holes pass through each of us every year, like invisible messengers from the Big Bang.
In Peter Watts' novel Blindsight, primordial black holes are not just background but the key to gravitational anomalies on which the mission's fate depends.
M_{\rm PBH} \simeq \mathcal{O}(1)\,M_\odot \times e^{-2(N_1 - 18)}
The mass of the resulting primordial black hole depends exponentially on the position of the USR feature relative to CMB scales: the closer the feature, the heavier the PBH.
\alpha_s \simeq -12\frac{\beta}{V_0^2} - 36\frac{\delta_\star^2}{V_0^2}
The running parameter α_s is determined by deviations from the inflection point of the inflaton potential and is inevitably negative if the inflaton crosses that point.
Scientists
Alan GuthAlexander FriedmannAndrei LindeGeorges LemaîtreJames PeeblesStephen Hawkingearly dark energy
black hole memory burden
mass inflation
hubble tension
inflation
refined inflationary dynamics
supermassive black hole growth
central engine
interaction model
inflationary gravitational waves
extreme mass ratio inspiral
hills mechanism
hubble constant measurement
eternal inflation
primordial black hole
five sigma
inflationary cosmology
dark energy black hole interaction
hubble flow
wald entropy