Diffuse inverse Compton and synchrotron emission from dark matter annihilations in galactic satellites

Abstract

Annihilating dark matter particles produce roughly as much power in electrons and positrons as in gamma ray photons. The charged particles lose essentially all of their energy to inverse Compton and synchrotron processes in the galactic environment. We discuss the diffuse signature of dark matter annihilations in satellites of the Milky Way (which may be optically dark with few or no stars), providing a tail of emission trailing the satellite in its orbit. Inverse Compton processes provide X-rays and gamma rays, and synchrotron emission at radio wavelengths might be seen. We discuss the possibility of detecting these signals with current and future observations, in particular EGRET and GLAST for the gamma rays.

13 pages, 5 figures

References in corpus (9)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Cosmological parameters from SDSS and WMAP
• A Model for Neutrino Masses and Dark Matter
• A "Baedecker" for the Dark Matter Annihilation Signal
• Dark matter annihilation in the halo of the Milky Way
• Accurate relic densities with neutralino, chargino and sfermion coannihilations in mSUGRA
• Neutralino Annihilation at the Galactic Center Revisited
• The observability of gamma-rays from neutralino annihilations in Milky Way substructure
• Detection of Leptonic Dark Matter

Cited by in corpus (59)

• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Detecting Dark Matter Annihilation with CMB Polarization : Signatures and Experimental Prospects
• Multi-frequency analysis of neutralino dark matter annihilations in the Coma cluster
• Dark Matter Candidates: A Ten-Point Test
• Evidence Of Dark Matter Annihilations In The WMAP Haze
• Galactic electrons and positrons at the Earth:new estimate of the primary and secondary fluxes
• The Dark Matter Annihilation Signal from Galactic Substructure: Predictions for GLAST
• Upper Bound on the Dark Matter Total Annihilation Cross Section
• A Comprehensive Search for Dark Matter Annihilation in Dwarf Galaxies
• Indication of Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
• Fitting the Gamma-Ray Spectrum from Dark Matter with DMFIT: GLAST and the Galactic Center Region
• Multi-wavelength signals of dark matter annihilations at the Galactic center
• Conservative Constraints on Dark Matter Annihilation into Gamma Rays
• Electroweak Bremsstrahlung in Dark Matter Annihilation
• Unidentified sources in the Fermi-LAT second source catalog: the case for DM subhalos
• Can Astrophysical Gamma Ray Sources Mimic Dark Matter Annihilation in Galactic Satellites?
• Gamma Rays From The Galactic Center and the WMAP Haze
• Strategies for Determining the Nature of Dark Matter
• Search for gamma-ray emission from eight dwarf spheroidal galaxy candidates discovered in Year Two of Dark Energy Survey with Fermi-LAT data
• Extracting the Gamma Ray Signal from Dark Matter Annihilation in the Galactic Center Region
• Searching for Dark Matter with X-ray Observations of Local Dwarf Galaxies
• Radio constraints on dark matter annihilation in the galactic halo and its substructures
• Substructure Boosts to Dark Matter Annihilation from Sommerfeld Enhancement
• Annihilation vs. Decay: Constraining dark matter properties from a gamma-ray detection
• Indirect Detection of Dark Matter with gamma rays
• Gamma-ray Constraints on Dark Matter Annihilation into Charged Particles
• The Isotropic Radio Background and Annihilating Dark Matter
• Constraining Supersymmetric Dark Matter With Synchrotron Measurements
• Prospects For Detecting Dark Matter With GLAST In Light Of The WMAP Haze
• Toward a Minimum Branching Fraction for Dark Matter Annihilation into Electromagnetic Final States
• Radio emission from dark matter annihilation in the Large Magellanic Cloud
• Panglossian Prospects for Detecting Neutralino Dark Matter in Light of Natural Priors
• Cosmic Frontier Indirect Dark Matter Detection Working Group Summary
• Gamma-ray signatures of annihilation to charged leptons in dark matter substructure
• Constraining Dark Matter Properties with Gamma-Rays from the Galactic Center with Fermi-LAT
• Multi-wavelength Searches for Particle Dark Matter
• Multi-messenger constraints on dark matter annihilation into electron-positron pairs
• Galaxy clusters in high definition: a dark matter search
• Search for gamma-ray emission from the 12 nearby dwarf spheroidal galaxies with 12 years of Fermi-LAT data
• Neutralino Annihilations and the Gas Temperature in the Dark Ages
• Search for gamma-ray emission from the nearby dwarf spheroidal galaxies with 9 years of Fermi-LAT data
• Searching for Dark Matter in Messier 33
• On the DM interpretation of the origin of non-thermal phenomena in galaxy clusters
• An excess of excesses examined via dark matter radio emissions from galaxies
• Analysing the radio flux density profile of the M31 galaxy: a possible dark matter interpretation
• Morphological Tests of the Pulsar and Dark Matter Interpretations of the WMAP Haze
• Connecting multi-lepton anomalies at the LHC and in Astrophysics with MeerKAT/SKA
• Prospects of future MeV telescopes in probing weak-scale Dark Matter
• Using $\gamma$-ray observations of dwarf spheroidal galaxies to test the possible common origin of the W-boson mass anomaly and the GeV $\gamma$-ray/antiproton excesses
• Testing the dark matter origin of the WMAP-Planck Haze with radio observations of Spiral Galaxies
• Indirect detection prospects for d${}^{\ast }$(2380) dark matter
• A radio-frequency WIMP search with the MeerKAT Galaxy Cluster Legacy Survey
• Statistics for dark matter subhalo searches in gamma rays from a kinematically constrained population model: Fermi-LAT-like telescopes
• Radio Signal by Galactic Dark Matter
• Neutralino Dark Matter as the Source of the WMAP Haze
• Inverse Compton gamma-rays from Galactic dark matter annihilation: Anisotropy signatures
• Searching for Neutrinos from WIMP Annihilations in the Galactic Stellar Disk
• Radio-Frequency Searches for Dark Matter in Dwarf Galaxies
• Cosmic Neutrino Bound on the Dark Matter Annihilation Rate in the Late Universe