Observations of the Fermi bubbles and the Galactic center excess with the DArk Matter Particle Explorer

Abstract

The DArk Matter Particle Explorer (DAMPE) is a space-borne high-energy particle detector that surveys the $\gamma$-ray sky above$\sim 2\mathrm{GeV}$ with a peak acceptance of $\sim 0.2{\mathrm{m}}^2\mathrm{sr}$. With the 102 months of data collected by DAMPE, we show that the Fermi bubbles are detected at a significance of $\sim 26\sigma$ and identify a GeV excess in the direction of Galactic center at $\sim 7\sigma$ confidence. Both spectra and morphology are consistent with those observed by Fermi-LAT and the GeV excess component can be interpreted by the dark matter annihilation with a mass of $\sim 50$ GeV and a velocity-averaged cross section of $\sim 10^{-26}\mathrm{c}{\mathrm{m}}^3{\mathrm{s}}^{-1}$ for the $\chi \chi \to b\bar{b}$ channel. Our results thus provide the first independent detection of these two intriguing diffuse gamma-ray sources besides Fermi-LAT.

arXiv comment24 pages, 18 figures and 6 tables, accepted for publication in ApJS

References in corpus (102)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• The Structure of Cold Dark Matter Halos
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Particle Dark Matter: Evidence, Candidates and Constraints
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits
• A History of Dark Matter
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• The mass distribution and gravitational potential of the Milky Way
• Propagation of cosmic-ray nucleons in the Galaxy
• Giant Gamma-ray Bubbles from Fermi-LAT: AGN Activity or Bipolar Galactic Wind?
• The spectrum of isotropic diffuse gamma-ray emission between 100 MeV and 820 GeV
• Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium
• Diffuse continuum gamma rays from the Galaxy
• Incremental Fermi Large Area Telescope Fourth Source Catalog
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
• On The Origin Of The Gamma Rays From The Galactic Center
• The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter
• Acceleration of petaelectronvolt protons in the Galactic Centre
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission
• Relativistic redshift of the star S0-2 orbiting the Galactic center supermassive black hole
• A novel determination of the local dark matter density
• Background model systematics for the Fermi GeV excess
• Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations
• Development of the Model of Galactic Interstellar Emission for Standard Point-Source Analysis of Fermi Large Area Telescope Data
• The Fermi Galactic Center GeV Excess and Implications for Dark Matter
• A New $\Sigma -D$ Relation and Its Application to the Galactic Supernova Remnant Distribution
• Fermi-LAT Observations of High-Energy Gamma-Ray Emission Toward the Galactic Center
• Very high energy gamma rays from the direction of Sagittarius A*
• The Milky Way total mass profile as inferred from Gaia DR2
• The Spectrum and Morphology of the Fermi Bubbles
• The DArk Matter Particle Explorer mission
• COBE's Galactic Bar and Disk
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• Measurement of the cosmic-ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite
• The 1st Fermi Lat Supernova Remnant Catalog
• Novel dark matter constraints from antiprotons in the light of AMS-02
• The Fermi Bubbles: Giant, Multi-Billion-Year-Old Reservoirs of Galactic Center Cosmic Rays
• Inverse Compton Origin of the Hard X-Ray and Soft Gamma-Ray Emission from the Galactic Ridge
• Detection of large-scale X-ray bubbles in the Milky Way halo
• Possible dark matter annihilation signal in the AMS-02 antiproton data
• The Consistency of Fermi-LAT Observations of the Galactic Center with a Millisecond Pulsar Population in the Central Stellar Cluster
• The Origin of the Extragalactic Gamma-Ray Background and Implications for Dark-Matter Annihilation
• The Fermi Bubbles. I. Possible Evidence for Recent AGN Jet Activity in the Galaxy
• Dark matter local density determination: recent observations and future prospects
• GeV excess in the Milky Way: The Role of Diffuse Galactic gamma ray Emission template
• Measurement of the cosmic ray helium energy spectrum from 70 GeV to 80 TeV with the DAMPE space mission
• Galactic Bulge Preferred Over Dark Matter for the Galactic Center Gamma-Ray Excess
• A New Model For The Loop-I (The North Polar Spur) Region
• Disrupted Globular Clusters Can Explain the Galactic Center Gamma Ray Excess
• Sensitivity Projections for Dark Matter Searches with the Fermi Large Area Telescope
• Galactic center at very high-energies
• Origin of the Fermi Bubble
• High-Energy Gamma Rays from the Milky Way: Three-Dimensional Spatial Models for the Cosmic-Ray and Radiation Field Densities in the Interstellar Medium
• The Fermi-LAT GeV Excess Traces Stellar Mass in the Galactic Bulge
• The characteristics of the Galactic center excess measured with 11 years of Fermi-LAT data
• Dark Matter Strikes Back at the Galactic Center
• Fermi Bubbles Inflated by Winds Launched from the Hot Accretion Flow in Sgr A*
• Detection of spectral hardenings in cosmic-ray boron-to-carbon and boron-to-oxygen flux ratios with DAMPE
• Dark Matter Interpretation of the Fermi-LAT Observation Toward the Galactic Center
• Fermi Bubbles in the Milky Way: the closest AGN feedback laboratory courtesy of Sgr A*?
• Evidence for Gamma-ray Jets in the Milky Way
• Millisecond pulsar interpretation of the Galactic center gamma-ray excess
• Strong Evidence that the Galactic Bulge is Shining in Gamma Rays
• Foreground Mismodeling and the Point Source Explanation of the Fermi Galactic Center Excess
• The on-orbit calibration of DArk Matter Particle Explorer
• Dark matter vs. Pulsars: Catching the impostor
• The Return of the Templates: Revisiting the Galactic Center Excess with Multi-Messenger Observations
• The Three-Dimensional Spatial Distribution of Interstellar Gas in the Milky Way: Implications for Cosmic Rays and High-Energy Gamma-Ray Emissions
• Inert Higgs Dark Matter for CDF-II W-boson Mass and Detection Prospects
• Fermi and eRosita bubbles as relics of the past activity of the Galactic black hole
• MAGIC observations of the diffuse $\gamma$-ray emission in the vicinity of the Galactic Centre
• A New Mask for An Old Suspect: Testing the Sensitivity of the Galactic Center Excess to the Point Source Mask
• Structure Formation Models Weaken Limits on WIMP Dark Matter from Dwarf Spheroidal Galaxies
• Testing the millisecond pulsar scenario of the Galactic center gamma-ray excess with very high energy gamma-rays
• Improving constraints on the extended mass distribution in the Galactic Center with stellar orbits
• Millisecond Pulsars from Accretion Induced Collapse as the Origin of the Galactic Centre Gamma-ray Excess Signal
• Search for gamma-ray spectral lines with the DArk Matter Particle Explorer
• Galactic dark matter search via phenomenological astrophysics modeling
• Explaining the GeV antiproton/$\gamma -$ray excesses and W-boson mass anomaly in an inert two Higgs doublet model
• The North Polar Spur and Aquila Rift
• The Fermi Bubbles Revisited
• Maximum Entropy Estimation of the Galactic Bulge Morphology via the VVV Red Clump
• An algorithm to resolve γ-rays from charged cosmic rays with DAMPE
• Fermi bubble edges: spectrum and diffusion function
• A Latitude-Dependent Analysis of the Leptonic Hypothesis for the Fermi Bubbles
• Robust inference of the Galactic centre gamma-ray excess spatial properties
• A Phantom Menace: On the Morphology of the Galactic Center Excess
• Simulation study of performance of the Very Large Area gamma-ray Space Telescope
• DmpIRFs and DmpST: DAMPE Instrument Response Functions and Science Tools for Gamma-Ray Data Analysis
• Robustness of the Galactic Center Excess Morphology Against Masking
• Interaction of the Loop I Supershell with the Local Hot Bubble
• Search for the gamma-ray spectral lines with the DAMPE and the Fermi-LAT observations
• Study of the Global Alignment for the DAMPE Detector
• Boresight Alignment of DArk Matter Particle Explorer
• PSF Calibration of DAMPE for gamma-ray Observations
• The calibrations of DAMPE $\gamma$-ray effective area