Formation and relaxation of halos in the context of wave DM particles evolving on a background of neutrino condensate

TL;DR

This study models how neutrino condensates influence the formation and relaxation of wave dark matter halos using numerical solutions of the Schrödinger-Poisson system.

Contribution

It introduces the effect of a neutrino condensate background on wave dark matter halo dynamics, showing marginal differences for certain parameters.

Findings

Neutrino condensate can affect halo formation depending on the cutoff parameter.

For cutoff around a few eV, dark matter and neutrino condensate coexist with minimal differences.

Results suggest potential for more complex cosmological models involving dark matter halos.

Abstract

We investigate the formation and relaxation of dark matter halos in the context of wave dark matter particles evolving on a background of neutrino condensate. To this aim, we solved numerically the Schrodinger-Poisson system to model the dynamical evolution of ultralight bosonic dark matter particles in the presence of neutrino condensate. The latter appears as an additional source of the gravitational field in the Poisson equation, while its dynamical evolution and interaction with the environment are neglected. We found that, depending by the value of the cutoff parameter, the presence of the background neutrino condensate can affect the formation and relaxation of wave dark matter halos. Nevertheless, for value of the cutoff of the order of a few eV, the two species can coexist showing only marginal differences with the only-wave dark matter case. These results open to the possibility of investigate about more complex cosmological scenarios involving the formation of dark matter halos.