Cosmic Magnetic Fields and the CMB

Details Cosmic Magnetic Fields and the CMB Cosmic Magnetic Fields and the CMB

2006-09-08

arxiv.org/abs/astro-ph/0609216v1

NewAstron.Rev.51:275-280,2007

Astronomy and Astrophysics

Astrophysics

12 pages, 6 figures, Contribution to the proceedings of the Francesco Melchiorri Memorial conference, Rome, April 2006

Scientific paper

10.1016/j.newar.2006.11.057

I describe the imprint of primordial magnetic fields on the CMB. I show that these are observable only if the field amplitude is of the order of $B\gsim 10^{-9}G$ on Mpc scale. I further argue that such fields are strongly constrained by the stochastic background of gravity waves which they produce. Primordial magnetic fields, which are strong enough to be seen in the CMB, are compatible with the nucleosynthesis bound, only if their spectrum is close to scale invariant, or maybe if helical magnetic fields provoke an inverse cascade. For helical fields, the CMB signature is especially interesting. It contains parity violating T-B and E--B correlations.

Affiliated with

Also associated with

No associations

Rating

Cosmic Magnetic Fields and the CMB 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 Cosmic Magnetic Fields and the CMB, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic Magnetic Fields and the CMB will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-111499