Cylindrical Euler–Poisson Equation in~a~Chaplygin Gas Medium

We studied the Euler–Poisson equation system in the case of cylindrical symmetry with the von Neumann–Sedov–Taylor-type of self-similar <span class="it">ansatz</span> and present scaling solutions. We have analysed the scenario governed by Chaplygin’s equation of state, which has historically been studied as a unifying framework of dark fluid for dark matter and dark energy. Abstract Published by the Jagiellonian University 2025 authors