Microwave Background Anisotropies from Alfven waves

Details Microwave Background Anisotropies from Alfven waves Microwave Background Anisotropies from Alfven waves

1998-07-09

arxiv.org/abs/astro-ph/9807089v1

Phys.Rev. D58 (1998) 123004

Astronomy and Astrophysics

Astrophysics

18 page LaTeX file, 4 postscript figs. included, submitted to PRD

Scientific paper

10.1103/PhysRevD.58.123004

We investigate microwave background anisotropies in the presence of primordial magnetic fields. We show that a homogeneous field with fixed direction can amplify vector perturbations. We calculate the correlations of $\delta T/T$ explicitly and show that a large scale coherent field induces correlations between $a_{\ell-1,m}$ and $a_{\ell+1,m}$. We discuss constraints on amplitude and spectrum of a primordial magnetic field imposed by observations of CMB anisotropies.

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