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

Shun Furusawa; Shoichi Yamada; Kohsuke Sumiyoshi; Hideyuki Suzuki

doi:10.1017/S174392131201321X

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

Shun Furusawa^*, Shoichi Yamada, Kohsuke Sumiyoshi, Hideyuki Suzuki

^*この研究の対応する著者

先進理工学部

研究成果: Conference contribution

抄録

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.

本文言語	English
ホスト出版物のタイトル	Death of Massive Stars
ホスト出版物のサブタイトル	Supernovae and Gamma-Ray Bursts
編集者	Peter W. A. San Antonio, Nobuyuki Kawai, Elena Pian
ページ	333-334
ページ数	2
版	S279
DOI	https://doi.org/10.1017/S174392131201321X
出版ステータス	Published - 2011 4月

出版物シリーズ

名前	Proceedings of the International Astronomical Union
番号	S279
巻	7
ISSN（印刷版）	1743-9213
ISSN（電子版）	1743-9221

ASJC Scopus subject areas

医学（その他）
天文学と天体物理学
栄養および糖尿病
公衆衛生学、環境および労働衛生
宇宙惑星科学

UN SDG

この成果は、次の持続可能な開発目標に貢献しています

文献へのアクセス

10.1017/S174392131201321X

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引用スタイル

Furusawa, S., Yamada, S., Sumiyoshi, K., & Suzuki, H. (2011). A new equation of state based on nuclear statistical equilibrium for core-collapse simulations. In P. W. A. San Antonio, N. Kawai, & E. Pian (Eds.), 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

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

Death of Massive Stars: Supernovae and Gamma-Ray Bursts. ed. / Peter W. A. San Antonio; Nobuyuki Kawai; Elena Pian. S279. ed. 2011. p. 333-334 (Proceedings of the International Astronomical Union; Vol. 7, No. S279).

研究成果: Conference contribution

Furusawa, S, Yamada, S, Sumiyoshi, K & Suzuki, H 2011, A new equation of state based on nuclear statistical equilibrium for core-collapse simulations. in PWA San Antonio, N Kawai & E Pian (eds), Death of Massive Stars: Supernovae and Gamma-Ray Bursts. S279 edn, Proceedings of the International Astronomical Union, no. S279, vol. 7, pp. 333-334. https://doi.org/10.1017/S174392131201321X

Furusawa, Shun ; Yamada, Shoichi ; Sumiyoshi, Kohsuke その他. / A new equation of state based on nuclear statistical equilibrium for core-collapse simulations. Death of Massive Stars: Supernovae and Gamma-Ray Bursts. editor / Peter W. A. San Antonio ; Nobuyuki Kawai ; Elena Pian. S279. ed. 2011. pp. 333-334 (Proceedings of the International Astronomical Union; S279).

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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.

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

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出版物シリーズ

ASJC Scopus subject areas

UN SDG

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