English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this work we study some features of head-on mergers of equilibriumsolutions of the Gross-Pitaevskii-Poisson system that rules the dynamics of theultralight bosonic dark matter model. The importance of equilibrium solutionsis that they play the role of halo cores in structure formation simulations. Weconsider a given range of initial conditions in order to sample the parameterspace in terms of mass ratio and head-on momentum. In each case we analyze therelaxation process induced by gravitational cooling in the high and lowmomentum regimes and estimate the relaxation time scales in each case. Wedetect a low frequency mode in the whole parameters space and it was found thatthe resulting configuration oscillates under this mode with amplitude thatdepends on the mass ratio and head-on momentum. In some cases the resultingconfiguration oscillates with changes in density of two orders of magnitude andwith a matter distribution that is far from isotropic. These results couldcontribute to the collection of possible mass distributions considered in thereconstruction of mass profiles obtained in structure formation simulations.

Relaxation of structures resulting from head-on mergers of ultralight bosonic dark matter cores