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An 84-μG magnetic field in a galaxy at redshift z = 0.692

Author

Listed:
  • Arthur M. Wolfe

    (University of California, San Diego, La Jolla, California 92093-0424, USA)

  • Regina A. Jorgenson

    (University of California, San Diego, La Jolla, California 92093-0424, USA)

  • Timothy Robishaw

    (University of California, Berkeley, California 94720-3411, USA)

  • Carl Heiles

    (University of California, Berkeley, California 94720-3411, USA)

  • Jason X. Prochaska

    (UCO-Lick Observatory; University of California, Santa Cruz, Santa Cruz, California 95464, USA
    University of California, Santa Cruz, Santa Cruz, California 95464, USA)

Abstract

Galactic magnetism: not what it used to B The magnetic field that pervades our Galaxy is an important constituent of the interstellar medium. Similar fields, known as B fields, seem to be present in galaxies with redshifts of z > 1, though the strength remains uncertain. Wolfe et al. report a measurement of a magnetic field B ≈ 84 µG in a galaxy at z = 0.692, using the same Zeeman-splitting technique that revealed an average value of B = 6 µG in the neutral interstellar gas of our Galaxy. This is completely unexpected since the leading theory of magnetic field generation, the dynamo model, predicts large-scale B fields to be weaker rather than stronger in the past.

Suggested Citation

  • Arthur M. Wolfe & Regina A. Jorgenson & Timothy Robishaw & Carl Heiles & Jason X. Prochaska, 2008. "An 84-μG magnetic field in a galaxy at redshift z = 0.692," Nature, Nature, vol. 455(7213), pages 638-640, October.
    • Handle: RePEc:nat:nature:v:455:y:2008:i:7213:d:10.1038_nature07264
    DOI: 10.1038/nature07264
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