### 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 | Proceedings of the International Astronomical Union |

Pages | 333-334 |

Number of pages | 2 |

Volume | 7 |

Edition | S279 |

DOIs | |

Publication status | Published - 2011 Apr |

### Publication series

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

Volume | 7 |

ISSN (Print) | 17439213 |

ISSN (Electronic) | 17439221 |

### Fingerprint

### Keywords

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

### ASJC Scopus subject areas

- Astronomy and Astrophysics

### Cite this

*Proceedings of the International Astronomical Union*(S279 ed., Vol. 7, pp. 333-334). (Proceedings of the International Astronomical Union; Vol. 7, No. S279). https://doi.org/10.1017/S174392131201321X

**A new equation of state based on nuclear statistical equilibrium for core-collapse simulations.** / Furusawa, Shun; Yamada, Shoichi; Sumiyoshi, Kohsuke; Suzuki, Hideyuki.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proceedings of the International Astronomical Union.*S279 edn, vol. 7, Proceedings of the International Astronomical Union, no. S279, vol. 7, pp. 333-334. https://doi.org/10.1017/S174392131201321X

}

TY - GEN

T1 - A new equation of state based on nuclear statistical equilibrium for core-collapse simulations

AU - Furusawa, Shun

AU - Yamada, Shoichi

AU - Sumiyoshi, Kohsuke

AU - Suzuki, Hideyuki

PY - 2011/4

Y1 - 2011/4

N2 - 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.

AB - 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.

KW - dense matter

KW - equation of state

KW - nuclear abundances & supernovae

UR - http://www.scopus.com/inward/record.url?scp=84866252998&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84866252998&partnerID=8YFLogxK

U2 - 10.1017/S174392131201321X

DO - 10.1017/S174392131201321X

M3 - Conference contribution

SN - 9781107019799

VL - 7

T3 - Proceedings of the International Astronomical Union

SP - 333

EP - 334

BT - Proceedings of the International Astronomical Union

ER -