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Shallow water analogue of the standing accretion shock instability: experimental demonstration and a two-dimensional model

Abstract : Despite the sphericity of the collapsing stellar core, the birth conditions of neutron stars can be highly nonspherical due to a hydrodynamical instability of the shocked accretion flow. Here we report the first laboratory experiment of a shallow water analogue, based on the physics of hydraulic jumps. Both the experiment and its shallow water modeling demonstrate a robust linear instability and nonlinear properties of symmetry breaking, in a system which is one million times smaller and about one hundred times slower than its astrophysical analogue.
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Submitted on : Wednesday, March 30, 2022 - 9:27:20 AM
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Thierry Foglizzo, Frédéric Masset, Jérôme Guilet, Gilles Durand. Shallow water analogue of the standing accretion shock instability: experimental demonstration and a two-dimensional model. Physical Review Letters, American Physical Society, 2012, 108, pp.051103. ⟨10.1103/PhysRevLett.108.051103⟩. ⟨insu-03622420⟩

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