Cosmic Gamma-ray from Inverse Compton Process in Unstable Dark Matter Scenario

Abstract

Motivated by the PAMELA anomaly in the fluxes of cosmic-ray electron and positron, we study the cosmic gamma-ray induced by the inverse Compton (IC) scattering process in unstable dark matter scenario assuming that the anomaly is due to the electron and positron emission by the decay of dark matter. We calculate the fluxes of IC-induced gamma-ray produced in our Galaxy and that from cosmological distance, and show that both of them are significant. If the gamma-ray flux is precisely determined by Fermi Gamma-ray Space Telescope for various line-of-sight directions, it will provide an important test of the decaying dark matter scenario.

11 pages, 4 figures

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Cited by in corpus (28)

• The nature of the Diffuse Gamma-Ray Background
• Constraining Very Heavy Dark Matter Using Diffuse Backgrounds of Neutrinos and Cascaded Gamma Rays
• Decaying Dark Matter in Light of the PAMELA and Fermi LAT Data
• Indirect Searches for Decaying Dark Matter
• Probing Dark Matter Decay and Annihilation with Fermi LAT Observations of Nearby Galaxy Clusters
• Intense Gamma-Ray Lines from Hidden Vector Dark Matter Decay
• Constraints on decaying dark matter from the extragalactic gamma-ray background
• Neutrino Signals from Dark Matter Decay
• White Dwarf Pulsars as Possible Cosmic Ray Electron-Positron Factories
• Detecting Gamma-Ray Anisotropies from Decaying Dark Matter: Prospects for Fermi LAT
• Probing heavy dark matter decays with multi-messenger astrophysical data
• Probing Gravitino Dark Matter with PAMELA and Fermi
• Gamma-ray Constraints on Hadronic and Leptonic Activities of Decaying Dark Matter
• Imprint of Multi-component Dark Matter on AMS-02
• Constraining Decaying Dark Matter with Fermi LAT Gamma-rays
• Cosmological constraints on dark matter annihilation and decay: Cross-correlation analysis of the extragalactic $\gamma$-ray background and cosmic shear
• Revisiting Multi-Component Dark Matter with New AMS-02 Data
• Exploration of decaying dark matter in a left-right symmetric model
• Gamma-rays from Nearby Clusters: Constraints on Selected Decaying Dark Matter Models
• Constraining particle dark matter using local galaxy distribution
• Unstable Gravitino Dark Matter - Prospects for Indirect and Direct Detection
• Cosmic Ray Spectra in Nambu-Goldstone Dark Matter Models
• Decaying Dark Matter in Supersymmetric Model and Cosmic-Ray Observations
• Decaying Dark Matter in Supersymmetric SU(5) Models
• Dark Matter Candidates in a Visible Heavy QCD Axion Model
• Fermi Constrains Dark Matter Origin of High Energy Positron Anomaly
• Revisiting gravitino dark matter in thermal leptogenesis
• Multicomponent Dark Matter in the Light of CALET and DAMPE