Galaxy cluster's magnetic field reconstructed for 1st time with record-breaking astronomy map

space.com Jul 21, 2026

Galaxy cluster’s magnetic field reconstructed for 1st time with record-breaking astronomy map

Curated by Shubham · TechCapsules · Jul 21, 2026

AI-summarised brief · reviewed before publication

Astronomers have, for the first time, mapped the magnetic field of an entire galaxy cluster, Abell 2255, using the deepest radio observations ever recorded. The European LOFAR telescope collected 224 hours of low‑frequency data, allowing the team to reconstruct field lines from the cluster’s core to its outskirts, several million light‑years across. Analysis shows the large‑scale magnetic structure is not random but aligned with gas motions generated during the cluster’s formation, stretching radially in some regions and turning tangential near shock fronts. Lead researcher Andrea Botteon of INAF says the findings link relativistic electron emission to the dynamics that build massive cosmic structures. The results appear in a pre‑print on arXiv and have been accepted by Astronomy & Astrophysics for future magnetic field studies.

💡 Why It Matters

· By directly linking magnetic geometry to gas dynamics, the map provides the first empirical test of theories describing how colossal structures magnetise themselves.

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spacenews.com · Jul 21

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space.com · Jul 21

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space.com · Jul 21

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