SKA-Phase 1 sensitivity for synchrotron radio emission from multi-TeV Dark Matter candidates

Abstract

In the era of radio astronomy, the high sensitivity of the Square Kilometre Array (SKA) could play a decisive role in the detection of new radio sources. In this work, we study the SKA sensitivity to the synchrotron radio emission expected by the annihilation of TeV DM candidate in the Draco dwarf spheroidal galaxy. On the one hand, we consider model-independent DM candidates: we find out that with 1000 hours of data-taking, SKA1-MID will be able to exclude up to 10 TeV thermal DM candidates that annihilate in $W^{+}{W}^{-}$ and $b\bar{b}$ channels. We also study as these constraints improve by including a density enhancement due to a DM-spike associated with an intermediate-mass black hole in Draco. On the other hand, we consider extra-dimensional brane-world DM candidates, dubbed branons. In this specific scenario, SKA allows us to set constraints on the branon parameter space ($f$,$M$), where $f$ is related to the coupling of the branon to the Standard Model particles and $M$ is the mass of the branon itself. In particular, we consider two different branon DM candidates. We find out that SKA will be able to set more stringent constraints on the branon DM candidate required in order to fit the AMS-02 data, yet the sensitivity of the instrument should be improved in order to study the branon candidate for the Galactic Centre. Nonetheless, we show that SKA represents - among other detectors - the most promising instrument for multi-wavelength detection of synchrotron radio emission by annihilating multi-TeV DM.

16 pages, 8 figures. Final version published in Physics of the Dark Universe

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Cited by in corpus (18)

• Fundamental Physics with the Square Kilometre Array
• Einstein, Planck and Vera Rubin: relevant encounters between the Cosmological and the Quantum Worlds
• Heavy dark matter particle annihilation in dwarf spheroidal galaxies: radio signals at the SKA telescope
• Toward the ultimate reach of current imaging atmospheric Cherenkov telescopes and their sensitivity to TeV dark matter
• Universal profiles for radio searches of dark matter in dwarf galaxies
• Cherenkov Telescope Array sensitivity to branon dark matter models
• Sensitivity of SKA to dark matter induced radio emission
• Constraining annihilating dark matter mass by the radio continuum spectral data of NGC4214 galaxy
• Multi-TeV dark matter density in the inner Milky Way halo: spectral and dynamical constraints
• Constraints to dark matter annihilation from high-latitude HAWC unidentified sources
• Gamma-ray and Synchrotron Radiation from Dark Matter annihilations in Ultra-faint Dwarf Galaxies
• SKA sensitivity for possible radio emission from dark matter in Omega Centauri
• Multi-frequency test of dark matter annihilation into long-lived particles in Sirius
• Axion-like particle searches with MeerKAT and SKA
• Combined search in dwarf spheroidal galaxies for branon dark matter annihilation signatures with the MAGIC telescopes
• Constraining branon dark matter from observations of the Segue 1 dwarf spheroidal galaxy with the MAGIC telescopes
• The potential of diffuse Galactic Ridge neutrino measurements to constrain dark matter
• Combined search in dwarf spheroidal galaxies for branon dark matter annihilation signatures with the MAGIC Telescopes