Typical density profile for warm dark matter haloes

Authors

  • Jordi Viñas,

    Corresponding author
    1. Institut de Ciències del Cosmos, Universitat de Barcelona (UB–IEEC), Martí i Franquès 1, E-08028 Barcelona, Spain
      E-mail: jvinas@am.ub.es
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  • Eduard Salvador-Solé,

    1. Institut de Ciències del Cosmos, Universitat de Barcelona (UB–IEEC), Martí i Franquès 1, E-08028 Barcelona, Spain
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  • Alberto Manrique

    1. Institut de Ciències del Cosmos, Universitat de Barcelona (UB–IEEC), Martí i Franquès 1, E-08028 Barcelona, Spain
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E-mail: jvinas@am.ub.es

ABSTRACT

Using the model for (bottom-up) hierarchical halo growth recently developed by Salvador-Solé et al., we derive the typical spherically averaged density profile for haloes with several relevant masses in the concordant warm dark matter (ΛWDM) cosmology with non-thermal sterile neutrinos of two different masses. The predicted density profiles become flat at small radii, as expected from the effects of the spectrum cut-off. The core cannot be resolved, however, because the non-null particle velocity yields the fragmentation of minimum mass protohaloes in small nodes, which invalidates the model at the corresponding radii.

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