Dynamical evolutin of quintessence dark energy in collapsing dark matter halos

Understand

In this paper, we analyze the dynamical evolution of quintessence dark energy induced by the collapse of dark matter halos.

• Different from other previous studies, we develop a numerical strategy which allows us to calculate the dark energy evolution for the entire history of the spherical collapse of dark matter halos, without the need of separate treatments for linear, quasi-linear and nonlinear stages of the halo formation.
• It is found that the dark energy perturbations evolve with redshifts, and their specific behaviors depend on the quintessence potential as well as the collapsing process.
• The overall energy density perturbation is at the level of $10^{-6}$ for cluster-sized halos.