Dark Matter: A Hidden Threat to Neutron Stars ⚡ экспресс
The study showed that if fermionic dark matter can move in extra spatial dimensions, its effective equation of state softens. Because of this, even a modest accumulation of particles inside a neutron star triggers collapse into a black hole, which then devours the entire star, creating a solar-mass object. For particles heavier than 10 TeV, such scenarios are already ruled out if there are more than two extra dimensions with sizes around a femtometer — that's orders of magnitude stricter than in the standard three-dimensional picture. Neutron stars unexpectedly serve as laboratories for hunting hidden dimensions.
A neutron star is the compressed remnant of a sun: a mountain of matter the size of a thimble. If dark matter—the invisible substance that holds galaxies together—accumulates inside, under certain conditions it spells doom. In ordinary space, an incredible mass is needed, but hidden dimensions change the rules.
Gravity is curved spacetime, like a stretched trampoline. Dark matter particles, like tiny ball bearings, slightly dent it. Extra dimensions roll them into a leaden marble that tears the fabric—a black hole forms. Zwicky predicted neutron stars, Rubin proved the reality of dark matter; now their ideas converge in a terrifying scenario.
A twist: the miniature hole doesn't evaporate instantly—extra dimensions slow down the radiation. It devours the star whole, imposing strict limits on the properties of dark matter: particles heavier than tens of TeV are ruled out if the dimensions are real. In flat three-dimensional space, the threshold would be orders of magnitude higher—by millions.
🎯 Extra dimensions could be no larger than an atomic nucleus—about a femtometer, which is a billion times thinner than a hair.
🎬 Like in 'Interstellar,' where five-dimensional space helped survive a black hole—only here, hidden dimensions create that hole in the first place.