Overview
- Bielefeld University researchers report a radio‑source count dipole 3.7 times larger than the expectation inferred from the CMB dipole under ΛCDM.
- The study combines LOFAR observations with two additional radio surveys and accounts for multi‑component radio galaxies to avoid double‑counting.
- The aggregated data produce a deviation exceeding five sigma, indicating a signal unlikely to result from random fluctuations.
- Earlier quasar and infrared measurements showed a similar excess, and the radio‑based approach reduces dust‑related biases that affect shorter wavelengths.
- The findings, published in Physical Review Letters, prompt calls for independent replication and scrutiny of possible survey or astrophysical systematics before revising models.