Pulsars point to nanohertz gravitational waves and offer a way to separate black‑hole mergers from primordial signals
New analyses suggest pulsars may be providing evidence of extremely low‑frequency (nanohertz) gravitational waves. Their timing could allow scientists to distinguish a background produced by supermassive black‑hole binaries from a primordial signal left over from the Big Bang, refining targets for long‑baseline low‑frequency gravitational‑wave studies.
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