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Galactic magnetic fields and hierarchical galaxy formation

Rodrigues, L.F.S.; Shukurov, A.; Fletcher, A.; Baugh, C.M.

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L.F.S. Rodrigues

A. Shukurov

A. Fletcher


A framework is introduced for coupling the evolution of galactic magnetic fields sustained by the mean-field dynamo with the formation and evolution of galaxies in cold dark matter cosmology. Estimates of the steady-state strength of the large-scale and turbulent magnetic fields from mean-field and fluctuation dynamo models are used together with galaxy properties predicted by semi-analytic models of galaxy formation for a population of spiral galaxies. We find that the field strength is mostly controlled by the evolving gas content of the galaxies. Thus, because of the differences in the implementation of the star formation law, feedback from supernovae and ram-pressure stripping, each of the galaxy formation models considered predicts a distribution of field strengths with unique features. The most prominent of them is the difference in typical magnetic field strengths obtained for the satellite and central galaxy populations as well as the typical strength of the large-scale magnetic field in galaxies of different mass.


Rodrigues, L., Shukurov, A., Fletcher, A., & Baugh, C. (2015). Galactic magnetic fields and hierarchical galaxy formation. Monthly Notices of the Royal Astronomical Society, 450(4), 3472-3489.

Journal Article Type Article
Acceptance Date May 27, 2015
Publication Date Jul 11, 2015
Deposit Date May 27, 2015
Publicly Available Date Jul 23, 2015
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 450
Issue 4
Pages 3472-3489
Keywords Galaxies: evolution, Galaxies: magnetic fields.


Published Journal Article (1.7 Mb)

Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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