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Biermann mechanism in primordial supernova remnants and seed magnetic fields
Author(s) -
Hanayama H.,
Takahashi K.,
Kotake K.,
Oguri M.,
Ichiki K.,
Ohno H.
Publication year - 2006
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200610552
Subject(s) - physics , dynamo , supernova , magnetic field , astrophysics , interstellar medium , amplitude , stars , magnetohydrodynamic drive , supernova remnant , bubble , instability , magnetohydrodynamics , magnetic energy , astronomy , galaxy , mechanics , magnetization , optics , quantum mechanics
We have studied the generation of magnetic fields by the Biermann mechanism in the pair‐instability supernovae explosions of the first stars. The Biermann mechanism produces magnetic fields in the shocked region between the bubble and interstellar medium (ISM), even if magnetic fields are absent initially. We have performed a series of two‐dimensional magnetohydrodynamic simulations with the Biermann term and estimate the amplitude and total energy of the produced magnetic fields. We .nd that magnetic fields with amplitude 10 –14 –10 –17 G are generated inside the bubble, though the amount of magnetic fields generated depend on specific values of initial conditions. This corresponds to magnetic fields with total energy of 10 28 –10 31 erg per each supernova remnant, which is strong enough to be the seed magnetic field for a galactic and/or interstellar dynamo. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)