Galactic cluster winds in presence of a dark energy

TL;DR

This paper presents a hydrodynamic model of galactic cluster winds influenced by dark energy, showing that dark energy enables unlimited acceleration of outflows, potentially leading to high-energy cosmic ray formation.

Contribution

It introduces a new analytical solution for polytropic gas outflows in dark energy presence, highlighting effects on wind acceleration and cosmic ray generation.

Findings

Dark energy allows unlimited wind acceleration after the critical point.

Wind acceleration can lead to high-energy cosmic ray production.

Dark energy influences outflow dynamics at smaller initial temperatures.

Abstract

We obtain a solution for the hydrodynamic outflow of the polytropic gas from the gravitating center, in presence of the uniform Dark Energy (DE). The antigravity of DE is enlightening the outflow and make the outflow possible at smaller initial temperature, at the same density. The main property of the wind in presence of DE is its unlimited acceleration after passing the critical point. In application of this solution to the winds from galaxy clusters we suggest that collision of the strongly accelerated wind with another galaxy cluster, or with another galactic cluster wind could lead to the formation of a highest energy cosmic rays.