Cosmological Magnetic Field : A Fossil of Density Perturbations in the Early Universe

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Other Title
  • 宇宙磁場 : 初期宇宙における密度ゆらぎの化石(最近の研究から)
  • 最近の研究から 宇宙磁場:初期宇宙における密度ゆらぎの化石
  • サイキン ノ ケンキュウ カラ ウチュウ ジバ ショキ ウチュウ ニ オケル ミツドユラギ ノ カセキ

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Abstract

It is one of the greatest problems in cosmology when and how cosmological magnetic fields are generated. We show that density perturbations in the early universe generate magnetic field by considering an effect which is so tiny that it has been neglected so far. By following the evolution of perturbations numerically we give the spectrum of generated magnetic field and show the possibility that they act as seed fields for galactic magnetic fields.

Journal

  • Butsuri

    Butsuri 61 (9), 666-670, 2006-09-05

    The Physical Society of Japan

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