Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae

H. Togashi, M. Takano, K. Sumiyoshi, K. Nakazato

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The equation of state (EOS) for hot asymmetric nuclear matter that is constructed with the variational method starting from the Argonne v18 and Urbana IX nuclear forces is applied to spherically symmetric core-collapse supernovae (SNe). We first investigate the EOS of isentropic ß-stable SN matter, and find that matter with the variational EOS is more neutron-rich than that with the Shen EOS. Using the variational EOS for uniform matter supplemented by the Shen EOS for non-uniform matter at low densities, we perform general-relativistic spherically symmetric simulations of core-collapse SNe with and without neutrino transfer, starting from a presupernova model of 15 M⊙. In the adiabatic simulation without neutrino transfer, the explosion is successful, and the explosion energy with the variational EOS is larger than that with the Shen EOS. In the case of the simulation with neutrino transfer, the shock wave stalls and then the explosion fails, as in other spherically symmetric simulations. The inner core with the variational EOS is more compact than that with the Shen EOS, due to the relative softness of the variational EOS. This implies that the variational EOS is more advantageous for SN explosions than the Shen EOS.

Original languageEnglish
Article number023D05
JournalProgress of Theoretical and Experimental Physics
Volume2014
Issue number2
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes

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supernovae
equations of state
explosions
neutrinos
simulation
softness
shock waves
neutrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae. / Togashi, H.; Takano, M.; Sumiyoshi, K.; Nakazato, K.

In: Progress of Theoretical and Experimental Physics, Vol. 2014, No. 2, 023D05, 01.01.2014.

Research output: Contribution to journalArticle

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