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Fast growth of magnetic fields in galaxy clusters: a self-accelerating dynamo

Abstract:

We propose a model of magnetic-field growth in galaxy clusters whereby the field is amplified by a factor of about 10^8 over a cosmologically short time of ~10^8 yr. Our model is based on the idea that the viscosity of the intracluster medium during the field-amplification epoch is determined not by particle collisions but by plasma microinstabilities: these give rise to small-scale fluctuations, which scatter particles, increasing their effective collision rate and, therefore, the effective ...

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Publication status:
Published

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Publisher copy:
10.1002/asna.200610600
Journal:
Astron.Nachr. More from this journal
Volume:
327
Issue:
5-6
Pages:
599-604
Publication date:
2005-08-25
DOI:
EISSN:
1521-3994
ISSN:
0004-6337
Language:
English
Keywords:
Pubs id:
pubs:160227
UUID:
uuid:e74a74ef-9b6a-4a9e-96c3-9658d17e0aec
Local pid:
pubs:160227
Source identifiers:
160227
Deposit date:
2012-12-19

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