Fermi Bubbles in Scalar Field Dark Matter halos

TL;DR

This paper proposes that excited states of Scalar Field Dark Matter can naturally explain Fermi Bubbles observed in our galaxy, suggesting future observations could confirm the dark boson nature of dark matter.

Contribution

It demonstrates that SFDM excited states can account for Fermi Bubbles, extending previous work on VPOS and linking dark matter structure to gamma-ray phenomena.

Findings

SFDM excited states can explain Fermi Bubbles

Predictions include more galaxies showing similar bubbles

Future gamma-ray observations could confirm the model

Abstract

In recent times, the Scalar Field Dark Matter (SFDM) model (also called Fuzzy, Wave, Ultralight dark matter model) has received much attention due to its success in describing dark matter on both cosmological and galactic scales. Several challenges of the Cold Dark Matter (CDM) model can be explained very easily and naturally by the SFDM model. Two of these challenges are to describe the anomalous trajectories of satellite galaxies called the Vast Polar Structure (VPOS) and to explain the Fermi Bubbles (FB) observed in our galaxy. In Phys.Rev.D103(2021)083535 an alternative explanation for VPOS was shown using the SFDM excited states, explaining the anomalous trajectories in a natural and simple way. In this work we use the same dark matter structure to show that these excited states of the SFDM can provide a very simple and natural explanation for the FB, assuming that the SFDM is a kind of dark boson. If this assumption is correct, we should see FB in several more galaxies and continue to see gamma-ray events at higher energies, these observations would take place in the near future and could be crucial to the ultimate answer to the nature of dark matter.