Generating neutron-star magnetic fields: three dynamo phases

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Abstract

Young neutron stars (NSs) have magnetic fields in the range 1012-1015 G, believed to be generated by dynamo action at birth. We argue that such a dynamo is actually too inefficient to explain the strongest of these fields. Dynamo action in the mature star is also unlikely. Instead we propose a promising new precession-driven dynamo and examine its basic properties, as well as arguing for a revised mean-field approach to NS dynamos. The precession-driven dynamo could also play a role in field generation in main-sequence stars.

Original languageEnglish
Pages (from-to)L36-L40
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume507
Issue number1
Early online date26 Jul 2021
DOIs
Publication statusPublished - 1 Oct 2021

Keywords

  • dynamo
  • stars: evolution
  • stars: magnetic field
  • stars: neutron
  • stars: rotation

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