Speaker
Description
The Fermi Bubbles are two approximately symmetric, lobe-shaped gamma-ray-emitting structures extending above and below the Galactic disk of the Milky Way, roughly along its rotation axis, to distances of about 9 kpc. Despite their discovery in 2010, their origin and formation history remain unclear. Leading proposed scenarios include outflows driven by past AGN activity and supernova feedback. In this study, we examine the potential role of millicharged multistate scalar-field dark matter in the propagation of large-scale magnetic modes and its possible implications for the transport and confinement of high-energy charged particles within the Fermi Bubble region. The charged scalar background modifies the propagation of magnetic modes within the characteristic bipolar structure of the multistate dark-matter halo. We investigate whether these modifications can lead to anisotropic propagation or localization of magnetic modes and thereby contribute to some of the characteristic features of the Fermi Bubbles, such as their bipolar morphology and sharp edges.