Vortons: Invisible Rings of Dark Matter express
Vortons are invisible cosmic hoops, closed loops of curved spacetime. Thinner than an atom but heavier than stars, these Big Bang relics spin like giant carousels, churning everything around them. Einstein's equations describe how particles dance near such a hoop: paths twist into spirals or dart chaotically. Even light changes direction, revealing the ghostly ring.
A special effect is frame dragging: the spinning hoop drags nearby bodies along, making their axes swirl like an invisible corkscrew. At its very edge, the hoop displays properties considered more exotic than those of black holes. Unlike them, vortons don't absorb light: they only distort it, like a giant invisible lens; a distant star might suddenly multiply into several ghostly twins.
Such properties make vortons ideal candidates for dark matter, long sought by Vera Rubin and Fritz Zwicky. By observing distortions in the light of distant stars, astronomers hope to catch these invisible hoops, and perhaps prove that dark matter isn't made of particles at all.
Original abstract
as written by the authors arXiv:2512.07364
Vortons are of interest in high-energy physics as possible dark matter candidates and as probes of Grand Unified Theories. Using the recently derived weak-field metric for a chiral vorton, we study the dynamics of test particles by analyzing both timelike and null geodesics. We identify several classes of trajectories, including bound precessing orbits, circular orbits, toroidal, and crown-type oscillations, as well as unbound scattering paths. Poincare surfaces of section reveal transitions between regular and chaotic motions that depend sensitively on the vorton tension $$G\mu$$ and initial conditions. We further compute the Lense-Thirring and general spin-precession frequencies for gyroscopes along Killing trajectories. The resulting precession profiles exhibit several distinct features not present in Kerr black holes but reminiscent of Kerr naked singularities, such as: divergences near the ring core, and multi-minima structures. These dynamical and precessional signatures may offer potential observational pathways for detecting vortons.
A cosmic string is billions of times thinner than an atom, yet a kilometer of it weighs as much as a mountain. Passing through Earth, it wouldn't hit a single particle, merely causing the planet to tremble imperceptibly.