# Strong shock in a uniformly expanding universe

@article{BisnovatyiKogan2014StrongSI, title={Strong shock in a uniformly expanding universe}, author={Gennadii S. Bisnovatyi-Kogan}, journal={Gravitation and Cosmology}, year={2014}, volume={21}, pages={236-240} }

An exact analytic solution of self-similar equations is obtained for propagation of a strong shock in a flat expanding Friedman universe. The time and radial dependences of the density and velocity of the polytropic gas behind the shock wave are obtained. The shock velocity in the expanding medium decreases as ~t−1/5, slower than the shock velocity in the static uniform medium (~t−3/5), and its radius increases ~t4/5, more rapidly than in a uniform non-gravitating medium (~t2/5). So, the shock…

## 2 Citations

Strong Shock in a Uniform Expanding Universe. Approximate and Exact Solutions of Self-Similar Equations

- PhysicsAstronomy Reports
- 2019

Self-similar solution is obtained for propagation of a strong shock, in a flat expanding dusty Friedman universe. Approximate analytic solution was obtained earlier, using relation between…

Strong Shock in the Uniformly Expanding Universe with a Spherical Void

- Physics, Mathematics
- 2020

Propagation of strong shock wave in the expanding universe is studied using approximate analytic, and exact numerical solution of self-similar equations. Both solutions have similar properties, which…

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