A new baryonic equation of state at sub-nuclear densities for core-collapse simulations

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

*この研究の対応する著者

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

We construct a new equation of state for baryons at sub-nuclear densities for the use in core-collapse simulations of massive stars. The formulation is based on the nuclear statistical equilibrium description and the liquid drop approximation of nuclei. The model free energy to minimize is calculated by using 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 to the rates of electron captures and coherent neutrino scatterings on nuclei in supernova cores. It is also interesting that the root mean square of the mass number is not very different from the average mass number, since the former is important for the evaluation of coherent scattering rates on nuclei but has been unavailable so far.

本文言語English
ホスト出版物のタイトルOrigin of Matter and Evolution of Galaxies 2011
ページ369-371
ページ数3
DOI
出版ステータスPublished - 2012 12月 1
イベントInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 - Wako, Japan
継続期間: 2011 11月 142011 11月 17

出版物シリーズ

名前AIP Conference Proceedings
1484
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Conference

ConferenceInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011
国/地域Japan
CityWako
Period11/11/1411/11/17

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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