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Supernova implosion-explosion in the light of catastrophe theory

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Abstract

The present understanding of supernova explosion of massive stars as a two-step process, with an initial gravitational collapse toward the center of the star followed by an expansion of matter after a bouncing on the core, meets several difficulties. We show that it is not the only possible one: a simple model based on fluid mechanics, catastrophe theory, and stability properties of the equilibrium state shows that one can have also a simultaneous inward/outward motion in the early stage of the instability of the supernova described by a dynamical saddle-center bifurcation. The existence of this simultaneous inward/outward motion is sensitive to the model in such systems with long-range interactions. If a constant temperature is assumed (canonical ensemble), an overall inward motion occurs, but if one imposes with the same equation of state the constraint of energy conservation (microcanonical ensemble) there is an inward velocity field near the center of the star together with an outward velocity field in the rest of the star. We discuss the expansion stage of the remnants away from the collapsed core, and propose a new explanation for the formation of shock waves in the ejecta which differs from the usual Sedov–Taylor self-similar description.

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Authors and Affiliations

  1. Laboratoire de Physique Théorique (UMR 5152 du CNRS), Université Paul Sabatier, 118 route de Narbonne, 31062, Toulouse Cedex 4, France

    Pierre-Henri Chavanis

  2. Université Aix-Marseille, IRPHE, UMR 7342 CNRS et Centrale Marseille, Technopole de Château-Gombert, 49 rue Joliot-Curie, 13384, Marseille Cedex 13, France

    Bruno Denet

  3. ISMO-CNRS, Université Paris-Saclay, 91405, Orsay Cedex, France

    Martine Le Berre

  4. Ladhyx, Ecole polytechnique, 91128, Palaiseau, France

    Yves Pomeau

Authors
  1. Pierre-Henri Chavanis
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  2. Bruno Denet
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  3. Martine Le Berre
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  4. Yves Pomeau
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Correspondence to Pierre-Henri Chavanis.

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Chavanis, PH., Denet, B., Le Berre, M. et al. Supernova implosion-explosion in the light of catastrophe theory. Eur. Phys. J. B 92, 271 (2019). https://doi.org/10.1140/epjb/e2019-100435-6

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  • DOI: https://doi.org/10.1140/epjb/e2019-100435-6

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