Abstract
We introduce a new mechanism for generating magnetic fields in the recombination era. This Harrison-like mechanism utilizes vorticity in baryons that is sourced through the Bose-Einstein condensate of axions via gravitational interactions. The magnetic fields generated are on galactic scales and have a magnitude of the order of today. The field has a greater magnitude than those generated from other mechanisms relying on second-order perturbation theory, and is sufficient to provide a seed for battery mechanisms.
- Received 14 July 2015
DOI:https://doi.org/10.1103/PhysRevD.93.043003
© 2016 American Physical Society
Physics Subject Headings (PhySH)
Gravitation, Cosmology & Astrophysics