### Abstract

We calculate a new equation of state for baryons at sub-nuclear densities for the use in core-collapse simulations of massive stars. The formulation is the nuclear statistical equilibrium description and the liquid drop approximation of nuclei. The model free energy to minimize is calculated by relativistic mean field theory for nucleons and the mass formula for nuclei with atomic number up to ∼ 1000. We have also taken into account the pasta phase. We find that the free energy and other thermodynamical quantities are not very different from those given in the standard EOSs that adopt the single nucleus approximation. On the other hand, the average mass is systematically different, which may have an important effect on the rates of electron captures and coherent neutrino scatterings on nuclei in supernova cores.

Original language | English |
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Title of host publication | Death of Massive Stars |

Subtitle of host publication | Supernovae and Gamma-Ray Bursts |

Editors | Peter W. A. San Antonio, Nobuyuki Kawai, Elena Pian |

Pages | 333-334 |

Number of pages | 2 |

Edition | S279 |

DOIs | |

Publication status | Published - 2011 Apr 1 |

### Publication series

Name | Proceedings of the International Astronomical Union |
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Number | S279 |

Volume | 7 |

ISSN (Print) | 1743-9213 |

ISSN (Electronic) | 1743-9221 |

### Keywords

- dense matter
- equation of state
- nuclear abundances & supernovae

### ASJC Scopus subject areas

- Medicine (miscellaneous)
- Astronomy and Astrophysics
- Nutrition and Dietetics
- Public Health, Environmental and Occupational Health
- Space and Planetary Science

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## Cite this

*Death of Massive Stars: Supernovae and Gamma-Ray Bursts*(S279 ed., pp. 333-334). (Proceedings of the International Astronomical Union; Vol. 7, No. S279). https://doi.org/10.1017/S174392131201321X