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Black Holes Fed on Matter from a Hidden Universe

Original: "Hidden-sector accretion and warped black-string seeds for high-redshift supermassive black holes"
· Chunshan Lin
arXiv:2606.03414v1 · 2026-06-02 · CC BY 4.0 · ⏱ 1 min · Cosmology General Relativity HEP Theory
Black holes may grow by feeding on matter from a parallel dimension, explaining their giant sizes in the early Universe.
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The JWST peers into the young Universe after expansion began and finds, in the centers of the first galaxies, black holes weighing a billion suns. They couldn't have grown that big the usual way — there just wasn't enough time. Karl Schwarzschild first described such objects, and Edwin Hubble proved that the expanding Universe lets us look back into the past.

Maybe the answer lies in a multidimensional neighbor. Our Universe is like one of two sheets of paper pressed tightly together: the gap between them is thinner than a hair. A black hole pierces both sheets, and matter from the invisible side also falls into the shared funnel. We're only seeing half its 'diet', hence the illusion of supercharged growth. Light from the infalling gas produces brilliant quasars, but some mass remains hidden. This also explains the smoothness of the cosmic microwave background — the early baby picture of the sky: the holes didn't disturb it so violently.

When two such holes merge, they should produce distinctive gravitational waves — ripples in the fabric of spacetime. Observatories like Rainer Weiss's project will be able to catch them. And then we’ll hear the echo of a neighboring world without ever leaving Earth.

🎯 If the hypothesis is correct, some black holes could be almost entirely made of matter from a parallel universe — there’s nothing of ours inside them.

\frac{dM_A}{dT_A} = e^{-2d/\ell} \frac{dM_B}{dT_B}
The mass growth rate on our brane (A) is exponentially related to that on the donor brane (B): the distance between branes and the curvature determine how efficient the invisible feeding is.
f_{\text{ISCO}} \approx \frac{c^3}{6^{3/2}\pi G M (1+z)} \approx 4.0 \,\text{mHz} \left(\frac{10^5 M_\odot}{M}\right)\left(\frac{11}{1+z}\right)
Frequency of gravitational waves from the merger of black holes of a given mass at redshift z — the 'music' that LISA will listen to.
Scientists
Alan GuthAndrei LindeGeorges LemaîtreJames PeeblesAdam RiessBrian Schmidt
Tags
black hole gravitational waves spacetime curvature quasar galaxy expansion of the universe JWST cosmic microwave background
Laws
Friedmann equationsHubble's lawHawking radiationgravitational lensingBekenstein-Hawking entropyEinstein field equations
Original: arXiv:2606.03414v1 · CC BY 4.0 · bridge42worlds