Typical density profile for warm dark matter haloes

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 t...

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Published inMonthly notices of the Royal Astronomical Society. Letters Vol. 424; no. 1; pp. L6 - L10
Main Authors Viñas, Jordi, Salvador‐Solé, Eduard, Manrique, Alberto
Format Journal Article
LanguageEnglish
Published Oxford, UK Blackwell Publishing Ltd 01.07.2012
Subjects
Cosmology
cosmology: theory
Cut-off
Dark matter
Density
Fragmentation
galaxies: haloes
Halos
Mathematical models
Wavelength division multiplexing
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Summary: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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ISSN:1745-3925
1745-3933
DOI:10.1111/j.1745-3933.2012.01274.x