The flattening of the concentration-mass relation towards low halo masses and its implications for the annihilation signal boost

Abstract

In the standard Cold Dark Matter (CDM) theory for understanding the formation of structure in the universe, there exists a tight connection between the properties of dark matter (DM) haloes, and their formation epochs. Such relation can be expressed in terms of a single key parameter, namely the halo concentration. In this work, we examine the median concentration-mass relation, c(M), at present time, over more than 20 orders of magnitude in halo mass, i.e., from tiny Earth-mass microhalos up to galaxy clusters. The c(M) model proposed by Prada et al. (2012), which links the halo concentration with the r.m.s. amplitude of matter linear fluctuations, describes remarkably well all the available N-body simulation data down to ~10^(-6) Msun microhalos. A clear fattening of the halo concentration-mass relation towards smaller masses is observed, that excludes the commonly adopted power-law c(M) models, and stands as a natural prediction for the CDM paradigm. We provide a parametrization for the c(M) relation that works accurately for all halo masses. This feature in the c(M) relation at low masses has decisive consequences e.g. for gamma-ray DM searches, as it implies more modest boosts of the DM annihilation flux due to substructure, i.e., ~35 for galaxy clusters and ~15 for galaxies like our own, as compared to those huge values adopted in the literature that rely on such power-law c(M) extrapolations. We provide a parametrization of the boosts that can be safely used for dwarfs to galaxy cluster-size halos.

Eight pages, 2 figures. MNRAS accepted version

References in corpus (16)

• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• Dark matter and cosmic structure
• A blueprint for detecting supersymmetric dark matter in the Galactic halo
• What mass are the smallest protohalos?
• Precise constraints on the dark matter content of Milky Way dwarf galaxies for gamma-ray experiments
• The velocity function in the local environment from LCDM and LWDM constrained simulations
• Dark matter subhalos and the dwarf satellites of the Milky Way
• The Dark Matter Annihilation Signal from Galactic Substructure: Predictions for GLAST
• Hierarchical Formation of Dark Matter Halos and the Free Streaming Scale
• Dark Matter Annihilation in Substructures Revised
• Indirect Dark Matter Detection from Dwarf Satellites: Joint Expectations from Astrophysics and Supersymmetry
• Galactic Substructure and Dark Matter Annihilation in the Milky Way Halo
• Analytical Approach to Subhaloes Population in Dark Matter Haloes
• gamma-rays from annihilating dark matter in galaxy clusters: stacking vs single source analysis
• Diffuse gamma-ray constraints on dark matter revisited. I: the impact of subhalos
• Clustering in the Phase Space of Dark Matter Haloes. II. Stable Clustering and Dark Matter Annihilation

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