Transfer matrices for magnetized CMB anisotropies

Details Transfer matrices for magnetized CMB anisotropies Transfer matrices for magnetized CMB anisotropies

2006-04-02

arxiv.org/abs/astro-ph/0604014v1

Phys.Rev.D73:101302,2006

Astronomy and Astrophysics

Astrophysics

9 pages

Scientific paper

10.1103/PhysRevD.73.101302

Large-scale magnetic fields can affect scalar cosmological perturbations whose evolution is described in the conformally Newtonian gauge and within the tight coupling approximation. The magnetized curvature perturbations present after matter radiation equality (and prior to decoupling) are computed in terms of an appropriate transfer matrix allowing a general estimate of the Sachs-Wolfe plateau. From the observation that CMB initial conditions should be (predominantly) adiabatic, the contribution of the magnetic field intensity can be constrained.

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