Speaker
Description
In this work, we investigate the possibility that the large-scale magnetic fields
observed in galaxies, of the order of microgauss, arise naturally from a complex Scalar Field Dark Matter (SFDM) halo charged under a local U(1) symmetry. Extending our previous work, where multistate SFDM solutions were shown to form “gravitational atoms” capable of explaining the anisotropic distribution of satellite galaxies (VPOS), we analyze here the coupled dynamics of the scalar and a gauge field at the perturbative level. By solving the perturbed Klein-Gordon and gauge-field equations, we find the temporal evolution and show that the spatial structure of the induced electromagnetic fields is governed by the same spherical Bessel functions and spherical harmonics that characterize the ground and excited states of the multistate SFDM halo. Remarkably, the presence of the gauge field does not modify the dark-matter density distribution, which preserves the multistate configuration previously obtained. Our results demonstrate that a charged multistate SFDM halo can generate coherent, large-scale magnetic fields whose morphology is determined by the excited modes of the scalar field, providing a unified framework in which both galactic magnetic fields and VPOS-like structures originate from the underlying quantum nature of dark matter.