Characterization of subhalo structural properties and implications for dark matter annihilation signals

Abstract

A prediction of the standard LCDM cosmology is that dark matter (DM) halos are teeming with numerous self-bound substructure, or subhalos. The precise properties of these subhalos represent important probes of the underlying cosmological model. We use data from Via Lactea II and ELVIS N-body simulations to learn about the structure of subhalos with masses 1e6 - 1e11 Msun/h. Thanks to a superb subhalo statistics, we study subhalo properties as a function of distance to host halo center and subhalo mass, and provide a set of fits that accurately describe the subhalo structure. We also investigate the role of subhalos on the search for DM annihilation. Previous work has shown that subhalos are expected to boost the DM signal of their host halos significantly. Yet, these works traditionally assumed that subhalos exhibit similar structural properties than those of field halos, while it is known that subhalos are more concentrated. Building upon our N-body data analysis, we refine the substructure boost model of Sanchez-Conde & Prada (2014), and find boosts that are a factor 2-3 higher. We further refine the model to include unavoidable tidal stripping effects on the subhalo population. For field halos, this introduces a moderate 20-30% suppression. Yet, for subhalos like those hosting dwarf galaxy satellites, tidal stripping plays a critical role, the boost being at the level of a few tens of percent at most. We provide a parametrization of the boost for field halos that can be safely applied over a wide halo mass range.

19 pages, 9 figures and 3 tables. Matches the MNRAS accepted version

References in corpus (16)

• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• Reconciling dwarf galaxies with LCDM cosmology: Simulating a realistic population of satellites around a Milky Way-mass galaxy
• Too Big to Fail in the Local Group
• Halo and Subhalo Demographics with Planck Cosmological Parameters: Bolshoi-Planck and MultiDark-Planck Simulations
• What mass are the smallest protohalos?
• Effects of cold dark matter decoupling and pair annihilation on cosmological perturbations
• Precise constraints on the dark matter content of Milky Way dwarf galaxies for gamma-ray experiments
• Hierarchical Formation of Dark Matter Halos and the Free Streaming Scale
• The survival and disruption of CDM micro-haloes: implications for direct and indirect detection experiments
• M31 Satellite Masses Compared to LCDM Subhaloes
• Analytical Approach to Subhaloes Population in Dark Matter Haloes
• Can Astrophysical Gamma Ray Sources Mimic Dark Matter Annihilation in Galactic Satellites?
• gamma-rays from annihilating dark matter in galaxy clusters: stacking vs single source analysis
• Could the Fermi-LAT detect gamma-rays from dark matter annihilation in the dwarf galaxies of the Local Group?
• A Merger Tree with Microsolar Mass Resolution: Application to $\gamma$-ray Emission from Subhalo Population

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