Relativistic bias in neutrino cosmologies

Understand

Halos and galaxies are tracers of the underlying dark matter structures.

• While their bias is well understood in the case of a simple Universe composed dominantly of dark matter, the relation becomes more complex in the presence of massive neutrinos.
• Indeed massive neutrinos introduce rich dynamics in the process of structure formation leading to scale-dependent bias.
• We study this process from the perspective of general relativity employing a simple spherical collapse model.