Analyzing the Fermi Bubbles with DArk Matter Particle Explorer

Abstract

The Fermi bubbles are two large structures above and below the Galactic Plane. They are first discovered by Fermi-LAT and thought to be related to the jet or the wind from the Galactic center. The DArk Matter Particle Explorer (DAMPE) is a space-borne high energy particle telescope aiming at measuring cosmic rays and photons in a broad energy range. In this work, we use 4.8 years of DAMPE photon data to search for the emission from the Fermi Bubbles. We calculate the TS values of the lobes and the significance of its curved spectrum. The obtained spectral parameters are then compared with those from the Fermi-LAT. We also search for the emission from the cocoon in the southeast part of lobes. Since the Galactic diffuse emission (GDE) model is a major source of systematic uncertainty, we also switch to the GDE models calculated with Galprop and evaluate the influence.

ICRC 2021: Gamma-ray Direct Rapporteur

“…Several analyses looking at the galactic center (GC) including first results from DAMPE of the Fermi Bubbles [30] and GC lines [31], the GC as a high-energy particle accelerator [32], modeling neutral atomic Hydrogen to improve the GC fit [33], Galactic CO maps [34], Al-26 spectroscopy in the Galaxy [35], Cosmic-ray acceleration sites in the galaxy [36,37], and adaptive template fitting to understand the Fermi GC excess [38].…”