Sommerfeld-enhanced dark matter searches with dwarf spheroidal galaxies

Abstract

We study observable signals from dark matter that self-annihilates via the Sommerfeld effect in dwarf spheroidal galaxies (dSphs). Since the effect of the Sommerfeld enhancement depends on the velocity of dark matter, it is crucial to determine the profile of dSphs to compute the J-factor, i.e., the line-of-sight integral of density squared. In our study we use the prior distributions of the parameters for satellite density profiles in order to determine the J-factor, making most out of the recent developments in the N-body simulations and semi-analytical modeling for the structure formation. As concrete models, we analyze fermionic dark matter that annihilates via a light scalar and Wino dark matter in supersymmetric models. We find that, with the more realistic prior distributions that we adopt in this study, the J-factor of the most promising dSphs is decreased by a factor of a few, compared with earlier estimates based on non-informative priors. Nevertheless, the Cherenkov Telescope Array should be able to detect the thermal Wino dark matter by pointing it toward best classical or ultrafaint dSphs for 500 hours.

arXiv comment28 pages, 10 figures, published version

References in corpus (54)

• The Aquarius Project: the subhalos of galactic halos
• A Theory of Dark Matter
• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• The Faintest Dwarf Galaxies
• Non-Perturbative Effect on Dark Matter Annihilation and Gamma Ray Signature from Galactic Center
• Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
• Explosive Dark Matter Annihilation
• Mini-Split
• Probing High-Scale and Split Supersymmetry with Higgs Mass Measurements
• A Complete Spectroscopic Survey of the Milky Way Satellite Segue 1: The Darkest Galaxy
• The Lightest Higgs Boson Mass in Pure Gravity Mediation Model
• The impact of dark matter cusps and cores on the satellite galaxy population around spiral galaxies
• The accretion history of dark matter halos III: A physical model for the concentration-mass relation
• Dwarf galaxy annihilation and decay emission profiles for dark matter experiments
• Pure Gravity Mediation with m_{3/2} = 10-100TeV
• Mass Splitting between Charged and Neutral Winos at Two-Loop Level
• Dark matter annihilation and decay in dwarf spheroidal galaxies: The classical and ultrafaint dSphs
• Spread Supersymmetry
• Standard Model anatomy of WIMP dark matter direct detection II: QCD analysis and hadronic matrix elements
• Direct Detection of Electroweak-Interacting Dark Matter
• Universal behavior in the scattering of heavy, weakly interacting dark matter on nuclear targets
• The accretion history of dark matter halos I: The physical origin of the universal function
• Gluon contribution to the dark matter direct detection
• WIMP-nucleon scattering with heavy WIMP effective theory
• Dark Matter Constraints from a Joint Analysis of Dwarf Spheroidal Galaxy Observations with VERITAS
• A Finely-Predicted Higgs Boson Mass from A Finely-Tuned Weak Scale
• The last breath of the Sagittarius dSph
• A realistic assessment of the CTA sensitivity to dark matter annihilation
• Dark matter annihilation and decay from non-spherical dark halos in the Galactic dwarf satellites
• A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations
• Direct Detection of the Wino- and Higgsino-like Neutralino Dark Matters at One-Loop Level
• The Cosmogrid Simulation: Statistical Properties of Small Dark Matter Halos
• Relic density of wino-like dark matter in the MSSM
• A complete calculation for direct detection of Wino dark matter
• Modeling evolution of dark matter substructure and annihilation boost
• Standard Model anatomy of WIMP dark matter direct detection I: weak-scale matching
• Direct Search of Dark Matter in High-Scale Supersymmetry
• Prospects for Heavy WIMP Dark Matter with CTA: the Wino and Higgsino
• An analytical model for the accretion of dark matter subhalos
• Searches for gamma-ray lines and `pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S
• Structure Formation Models Weaken Limits on WIMP Dark Matter from Dwarf Spheroidal Galaxies
• Resummed Photon Spectra for WIMP Annihilation
• Precision Photon Spectra for Wino Annihilation
• How low does it go? Too few Galactic satellites with standard reionization quenching
• Sommerfeld-Enhanced $J$-Factors For Dwarf Spheroidal Galaxies
• On velocity-dependent dark matter annihilations in dwarf satellites
• Hunting for Heavy Winos in the Galactic Center
• Dark Matter in $\gamma$ lines: Galactic Center vs dwarf galaxies
• Resummed photon spectrum from dark matter annihilation for intermediate and narrow energy resolution
• Search for Gamma-ray Spectral Lines from Dark Matter Annihilation in Dwarf Galaxies with the High-Altitude Water Cherenkov Observatory
• Testing dark matter with Cherenkov light -- prospects of H.E.S.S. and CTA for exploring minimal supersymmetry
• Sommerfeld-corrected relic abundance of wino dark matter with NLO electroweak potentials
• $J$-factors for self-interacting dark matter in 20 dwarf spheroidal galaxies
• Constraints on the Sommerfeld-enhanced dark matter annihilation from the gamma rays of subhalos and dwarf galaxies

Cited by in corpus (8)

• $J$-factors for Velocity-dependent Dark Matter
• Classification of gamma-ray targets for velocity-dependent and subhalo-boosted dark-matter annihilation
• Constraining Dark Matter Microphysics with the Annihilation Signal from Subhalos
• Prospects for measuring dark matter microphysics with observations of dwarf spheroidal galaxies
• Cosmological prior for the $J$-factor estimation of dwarf spheroidal galaxies
• Analytical insight into dark matter subhalo boost factors for Sommerfeld-enhanced $s$- and $p$-wave $\gamma$-ray signals
• Searching for dark matter annihilating into light long-lived mediators from stars inside dwarf spheroidal galaxies
• Thermal Real Scalar Triplet Dark Matter