Magnetic fields brewed in a cup of cosmic soup

• Autores: Maggie McKee
• Localización: New scientist, ISSN 0262-4079, Nº. 2534, 2006, págs. 16-16
• Idioma: inglés
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• Resumen

  • The first ever magnetic fields in the universe arose within 370, 000 years after the big bang , suggests a new analysis which -- unlike some previous theories -- relies on established physics, and may also tell everyone about the very first star. Magnetic fields like those of the Earth and sun were set up by turbulent mixing of conducting fluids in their cores. But the large-scale fields tangled within the galaxies and clusters of galaxies are harder to explain alone because most galaxies have rotated only a few dozen times since they formed, and would have needed an initial "seed" magnetic field to get thing going.