Inflation-Produced Magnetic Fields in R^n F^2 and I F^2 models

Details Inflation-Produced Magnetic Fields in R^n F^2 and I F^2 models Inflation-Produced Magnetic Fields in R^n F^2 and I F^2 models

2008-02-19

arxiv.org/abs/0802.2630v2

Phys.Rev.D77:123002,2008

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures. Minor revisions. References added. Accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.77.123002

We re-analyze the production of seed magnetic fields during Inflation in (R/m^2)^n F_{\mu \nu}F^{\mu \nu} and I F_{\mu \nu}F^{\mu \nu} models, where n is a positive integer, R the Ricci scalar, m a mass parameter, and I \propto \eta^\alpha a power-law function of the conformal time \eta, with \alpha a positive real number. If m is the electron mass, the produced fields are uninterestingly small for all n. Taking m as a free parameter we find that, for n \geq 2, the produced magnetic fields can be sufficiently strong in order to seed dynamo mechanism and then to explain galactic magnetism. For \alpha \gtrsim 2, there is always a window in the parameters defining Inflation such that the generated magnetic fields are astrophysically interesting. Moreover, if Inflation is (almost) de Sitter and the produced fields almost scale-invariant (\alpha \simeq 4), their intensity can be strong enough to directly explain the presence of microgauss galactic magnetic fields.

Affiliated with

Also associated with

No associations

Rating

Inflation-Produced Magnetic Fields in R^n F^2 and I F^2 models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Inflation-Produced Magnetic Fields in R^n F^2 and I F^2 models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inflation-Produced Magnetic Fields in R^n F^2 and I F^2 models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-338546