Improved Mixed Dark Matter Halo Model for Ultralight Axions

Understand

We present a complete halo model for mixed dark matter composed of cold dark matter (CDM) and ultralight axion-like particles (ULAs).

• Our model treats ULAs as a biased tracer of CDM, in analogy to treatments of massive neutrinos and neutral hydrogen.
• The model accounts for clustering of ULAs around CDM host halos, and fully models the cross correlations of both components.
• The model inputs include the ULA Jeans scale, and soliton density profile.