Magnetic fields from inflation?

Journal Article · Sat Aug 01 00:00:00 EDT 2009 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2009/08/025· OSTI ID:22273233

Demozzi, Vittoria; Mukhanov, Viatcheslav ^[1]; Rubinstein, Hector ^[2]

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1. Arnold-Sommerfeld-Center for Theoretical Physics, Department für Physik, Ludwig-Maximilians-Universität München, Theresienstr. 37, D-80333 Munich (Germany)
2. The Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm (Sweden)

We consider the possibility of generation of the primordial magnetic field on inflation and show that the effect of the back reaction of this field can be very important. Assuming that the back reaction does not spoil inflation we find a rather strong restriction on the amplitude of the primordial field which could be generated on inflation. Namely, this amplitude recalculated to the present epoch cannot exceed 10{sup −32}G in Mpc scales. This field seems to be too small to be amplified to the observable values by a possible dynamo mechanism.

• OSTI ID: 22273233
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2009, Issue 08; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
AMPLITUDES
ASTROPHYSICS
INFLATIONARY UNIVERSE
INFLATONS
MAGNETIC FIELDS