A model-independent analysis of the Fermi Large Area Telescope gamma-ray data from the Milky Way dwarf galaxies and halo to constrain dark matter scenarios

Abstract

We implemented a novel technique to perform the collective spectral analysis of sets of multiple gamma-ray point sources using the data collected by the Large Area Telescope onboard the Fermi satellite. The energy spectra of the sources are reconstructed starting from the photon counts and without assuming any spectral model for both the sources and the background. In case of faint sources, upper limits on their fluxes are evaluated with a Bayesian approach. This analysis technique is very useful when several sources with similar spectral features are studied, such as sources of gamma rays from annihilation of dark matter particles. We present the results obtained by applying this analysis to a sample of dwarf spheroidal galaxies and to the Milky Way dark matter halo. The analysis of dwarf spheroidal galaxies yields upper limits on the product of the dark matter pair annihilation cross section and the relative velocity of annihilating particles that are well below those predicted by the canonical thermal relic scenario in a mass range from a few GeV to a few tens of GeV for some annihilation channels.

arXiv comment17 pages; 11 figures

References in corpus (19)

• A Universal Density Profile from Hierarchical Clustering
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Supersymmetric Dark Matter
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• The Spectral Energy Distribution of Fermi bright blazars
• DarkSUSY: Computing Supersymmetric Dark Matter Properties Numerically
• Accurate masses for dispersion-supported galaxies
• Observability of Gamma Rays from Dark Matter Neutralino Annihilations in the Milky Way Halo
• Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
• The dark matter density at the Sun's location
• Weak Corrections are Relevant for Dark Matter Indirect Detection
• Exclusion of canonical WIMPs by the joint analysis of Milky Way dwarfs with Fermi
• A Complete Spectroscopic Survey of the Milky Way Satellite Segue 1: The Darkest Galaxy
• Fitting the Gamma-Ray Spectrum from Dark Matter with DMFIT: GLAST and the Galactic Center Region
• Bayesian Inference in Processing Experimental Data: Principles and Basic Applications
• Robust implications on Dark Matter from the first FERMI sky gamma map
• A Bayesian approach to evaluate confidence intervals in counting experiments with background
• Gamma-ray source stacking analysis at low galactic latitude

Cited by in corpus (46)

• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• Search for Gamma-Ray Emission from DES Dwarf Spheroidal Galaxy Candidates with Fermi-LAT Data
• A Comprehensive Search for Dark Matter Annihilation in Dwarf Galaxies
• Indication of Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
• Sensitivity Projections for Dark Matter Searches with the Fermi Large Area Telescope
• LHC and Tevatron bounds on the dark matter direct detection cross-section for vector mediators
• Snake in the Clouds: A new nearby dwarf galaxy in the Magellanic bridge
• A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations
• Non-Baryonic Dark Matter in Cosmology
• Handling the Uncertainties in the Galactic Dark Matter Distribution for Particle Dark Matter Searches
• Search for gamma-ray emission from eight dwarf spheroidal galaxy candidates discovered in Year Two of Dark Energy Survey with Fermi-LAT data
• A critical reassessment of particle Dark Matter limits from dwarf satellites
• Dark matter constraints from dwarf galaxies: a data-driven analysis
• Statistical Issues in Astrophysical Searches for Particle Dark Matter
• Indirect Detection of Dark Matter with gamma rays
• Constraint on the velocity dependent dark matter annihilation cross section from Fermi-LAT observations of dwarf galaxies
• Model-independent constraints on dark matter annihilation in dwarf spheroidal galaxies
• Confronting Galactic and Extragalactic $\gamma$-ray observed by Fermi-LAT with Annihilating Dark Matter in Inert Higgs Doublet Model
• A generic method to constrain the dark matter model parameters from Fermi observations of dwarf spheroids
• Strong Optimized Conservative Fermi-LAT Constraints on Dark Matter Models from the Inclusive Photon Spectrum
• Investigating the effect of Milky Way dwarf spheroidal galaxies extension on dark matter searches with Fermi-LAT data
• Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies
• Gamma-Ray Dark Matter Searches in Milky Way Satellites -- A Comparative Review of Data Analysis Methods and Current Results
• Gamma-ray emission from the Sagittarius Dwarf Spheroidal galaxy due to millisecond pulsars
• Neutralino Dark Matter with Light Staus
• TeV Dark Matter Searches in the Extragalactic Gamma-Ray Sky
• Dark matter annihilation into right-handed neutrinos and the galactic center gamma-ray excess
• Prospect for dark matter signatures from dwarf galaxies by LHAASO
• Novel Techniques for Decomposing Diffuse Backgrounds
• MADHAT: Model-Agnostic Dark Halo Analysis Tool
• Uncovering dark matter density profiles in dwarf galaxies with graph neural networks
• Testing the dark matter subhalo hypothesis of the gamma-ray source 3FGL J2212.5+0703
• Indirect Detection of Sub-GeV Dark Matter Coupling to Quarks
• A Robust Method for Treating Astrophysical Mismodeling in Dark Matter Annihilation Searches of Dwarf Spheroidal Galaxies
• Searches for correlation between UHECR events and high-energy gamma-ray Fermi-LAT data
• Searching for Gamma-Ray Emission from Reticulum II by Fermi-LAT
• Trial by FIRE: Probing the dark matter density profile of dwarf galaxies with GraphNPE
• Right-handed sneutrinos as asymmetric DM and neutrino masses from neutrinophilic Higgs bosons
• Indirect Detection of Low-mass Dark Matter Through the ${\pi }^0$ and $\eta$ Windows
• Dark Resonance
• Dark Matter Searches with the Fermi-LAT in the Direction of Dwarf Spheroidals
• Indirect searches for dark matter with the Fermi LAT instrument
• Cosmological Constraints on MFV SUSY