title: 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.
authors.affiliation: Laboratoire AIM Paris-Saclay, CEA/Irfu Université Paris-Diderot CNRS/INSU, F-91191 Gif sur Yvette, France.
authors.forename: Thierry
authors.initials: T
authors.lastname: Foglizzo
authors.forename: Frédéric
authors.initials: F
authors.lastname: Masset
authors.forename: Jérôme
authors.initials: J
authors.lastname: Guilet
authors.forename: Gilles
authors.initials: G
authors.lastname: Durand