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Effects of the temperature dependence of the in-medium nucleon mass on core-collapse supernovae

Abstract : A complete description of the core collapse supernova mechanism requires an appropriate treatment of both the hydrodynamics and the microphysics. We study the influence of a nuclear physics input, namely the temperature dependence of the nucleon effective mass in nuclei induced by the in-medium effects, in the core collapse of a massive star. Methods. We present here the first implementation of this nuclear input in a hydrodynamical one-dimensional simulation. The simulations are performed with a spherically symmetric Newtonian model, with neutrino transport treated in the multi-group flux-limited diffusion approximation. Results. The inclusion of the temperature dependence of the in-medium nucleon mass has an impact on the equation of state of the system and reduces the deleptonisation during the collapse. This results in a non-negligible effect on the shock wave energetics. The shock wave is formed more outwards, and in the first few milliseconds after bounce the shock front has propagated further out.
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Submitted on : Monday, August 20, 2012 - 2:18:49 PM
Last modification on : Wednesday, September 23, 2020 - 4:39:41 AM

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A. F. Fantina, P. Blottiau, J. Margueron, Ph. Mellor, P. M. Pizzochero. Effects of the temperature dependence of the in-medium nucleon mass on core-collapse supernovae. Astronomy and Astrophysics - A&A, EDP Sciences, 2012, 541, pp.A30. ⟨10.1051/0004-6361/201118187⟩. ⟨in2p3-00724289⟩

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