Gravitational wave amplification of seed magnetic fields

Details Gravitational wave amplification of seed magnetic fields Gravitational wave amplification of seed magnetic fields

2001-12-29

arxiv.org/abs/astro-ph/0112560v3

Phys.Lett. B561 (2003) 17-25

Astronomy and Astrophysics

Astrophysics

Revised version, to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(03)00415-5

We discuss how gravitational waves could amplify seed magnetic fields to strengths capable of supporting the galactic dynamo. We consider the interaction of a weak magnetic field with gravity wave distortions in almost FRW cosmologies and find that the magnitude of the original field is amplified proportionally to the wave induced shear anisotropy and, crucially, proportionally to the square of the field's initial scale. The latter makes our mechanism particularly efficient when operating on superhorizon sized magnetic fields, like those produced during inflation. In that case, the achieved amplification can easily boost magnetic strengths, which may still lie relatively close to the galactic dynamo lower limits, well within the currently accepted range.

Affiliated with

Also associated with

No associations

Rating

Gravitational wave amplification of seed magnetic fields 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 Gravitational wave amplification of seed magnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravitational wave amplification of seed magnetic fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-95431