We solve the equation of the equilibrium for systems with a polytropic equation of state, in the frame of the Newtonian gravity, with non-zero cosmological constant Λ. We also investigate the stability of equilibrium solutions and show that dark energy reduces the dynamic stability of the configuration. We apply the results for analyzing the properties of equilibrium states for cluster of galaxies in the present universe with non-zero Λ.
Polytropic equilibrium models with non-zero cosmological constant / Merafina, Marco; Gennady S., Bisnovatyi Kogan; Sergey O., Tarasov. - STAMPA. - B:(2015), pp. 1549-1552. (Intervento presentato al convegno The Thirteenth Marcel Grossmann Meeting - On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - The MG13 Meeting on General Relativity tenutosi a Stockholm University, Sweden nel JULY 1-7, 2012) [10.1142/9789814623995_0221].
Polytropic equilibrium models with non-zero cosmological constant
MERAFINA, Marco;
2015
Abstract
We solve the equation of the equilibrium for systems with a polytropic equation of state, in the frame of the Newtonian gravity, with non-zero cosmological constant Λ. We also investigate the stability of equilibrium solutions and show that dark energy reduces the dynamic stability of the configuration. We apply the results for analyzing the properties of equilibrium states for cluster of galaxies in the present universe with non-zero Λ.| File | Dimensione | Formato | |
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