The researchers first started searching for signals and a radio glow from the cosmic web in 2020. Brown) Strumming the filaments of a cosmic web "These shockwaves give off radio emissions which should result in the cosmic web 'glowing' in the radio spectrum, but it had never really been conclusively detected due to how faint the signals are," Vernstrom continued.īy stacking data and all-sky radio maps from the Global Magneto-Ionic Medium Survey, the Planck Legacy Archive, the Owens Valley Long Wavelength Array and the Murchison Widefield Array over the known clusters and filaments in the cosmic web, Vernstrom and the team spotted these radio emissions for the first time.Ī composite image of 3 different observations of the cosmic web (gas, radio and magnetic) accompanied by a composite image. ![]() As a result, these fields should emit a radio wave glow that should be observable with radio telescopes here on Earth. In the cosmic web, gravity draws filaments together and this should generate shockwaves that make the magnetic field in the web stronger. Vernstrom added that when matter merges in the universe, it produces a shockwave that accelerates particles, and this amplifies intergalactic magnetic fields. (opens in new tab) "However, many aspects of cosmic magnetism are not yet fully understood, especially at the scales seen in the cosmic web." ![]() "Magnetic fields pervade the universe - from planets and stars to the largest spaces in-between galaxies," lead author and International Centre for Radio Astronomy Research (ICRAR) researcher, Tessa Vernstrom said in a statement.
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