Equation of state for nuclear matter in core-collapse supernovae by the variational method

H. Togashi, Y. Takehara, S. Yamamuro, K. Nakazato, H. Suzuki, K. Sumiyoshi, M. Takano

Research output: Contribution to journalConference article

Abstract

We construct a new nuclear equation of state (EOS) for core-collapse supernova (SN) simulations using the variational many-body theory. For uniform nuclear matter, the EOS is constructed with the cluster variational method starting from the realistic nuclear Hamiltonian composed of the Argonne v18 two-body potential and the Urbana IX three-body potential. The masses and radii of neutron stars calculated with the obtained EOS at zero temperature are consistent with recent observational data. For non-uniform nuclear matter, we construct the EOS in the Thomas-Fermi approximation. In this approximation, we assume a functional form of the density distributions of protons, neutrons, and alpha-particles, and minimize the free energy density in a Wigner-Seitz cell with respect to the parameters included in the assumed density distribution functions. The phase diagram of hot nuclear matter at a typical temperature is reasonable as compared with that of the Shen EOS.

Original languageEnglish
Article number012058
JournalJournal of Physics: Conference Series
Volume569
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event3rd International Workshop on State of the Art in Nuclear Cluster Physics, SOTANCP 2014 - Yokohama, Japan
Duration: May 26 2014May 30 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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