Dark stars may have seeded early supermassive black holes, study finds

A faint, persistent hum of gravitational waves permeating the universe may trace its origins to ancient “dark stars,” the massive, short‑lived objects that once ignited in the early cosmos. Recent theoretical work suggests that the collective radiation from these collapsed stars could form a stochastic background of spacetime ripples, offering a new window into the universe’s first billion years.

Astrophysicists model dark stars as hydrogen‑rich, metal‑poor objects that grew to hundreds of solar masses before collapsing into black holes. These remnants are thought to be the progenitors of the supermassive black holes that now sit at the centers of galaxies. By calculating the expected gravitational wave signatures from such collapses, researchers predict a low‑frequency background that could be detectable by next‑generation detectors, such as the Laser Interferometer Space Antenna (LISA), and might help confirm the role of dark stars in seeding the early universe’s most massive black holes.

If confirmed, this gravitational wave background would provide the first indirect evidence of dark stars and illuminate the processes that led to the rapid assembly of supermassive black holes. The discovery would deepen our understanding of cosmic evolution and the mechanisms that shaped the large‑scale structure of the universe.