Evolution of inflation-generated magnetic field through phase transitions

We study the evolution of an inflation-generated magnetic field, due to its coupling to fluid motions, during cosmological phase transitions. We find that the magnetic field stays almost unchanged on large scales, while on small scales, the spectrum is modified in such a way that power at small scal...

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Bibliographic Details
Published in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2012-11, Vol.86 (10), p.103005, Article 103005
Main Authors: Kahniashvili, Tina, Brandenburg, Axel, Campanelli, Leonardo, Ratra, Bharat, Tevzadze, Alexander G.
Format: Article
Language:English
Subjects:
1es 0229+200
Anisotropy
Early Universe
Evolution
Fluid dynamics
Fluid flow
Helicity
Hydromagnetic Turbulence
Kinetic energy
Light
Magnetic fields
Phase transformations
Radiation
Scalar
Small scale
String Cosmology
Tev Blazars
Turbulence
Turbulent flow
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Summary:We study the evolution of an inflation-generated magnetic field, due to its coupling to fluid motions, during cosmological phase transitions. We find that the magnetic field stays almost unchanged on large scales, while on small scales, the spectrum is modified in such a way that power at small scales becomes progressively suppressed. We also show that the magnetic field generates turbulent motions in the initially turbulence-free plasma. On large scales, the slope of the resulting kinetic energy spectrum is consistent with that of white noise.
ISSN:1550-7998
1550-2368
1550-2368
DOI:10.1103/PhysRevD.86.103005