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

Shun Furusawa, Shoichi Yamada, Kohsuke Sumiyoshi, Hideyuki Suzuki

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    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.

    Original languageEnglish
    Title of host publicationAIP Conference Proceedings
    Pages369-371
    Number of pages3
    Volume1484
    DOIs
    Publication statusPublished - 2012
    EventInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 - Wako
    Duration: 2011 Nov 142011 Nov 17

    Other

    OtherInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011
    CityWako
    Period11/11/1411/11/17

    Fingerprint

    equations of state
    nuclei
    simulation
    free energy
    coherent scattering
    approximation
    massive stars
    electron capture
    nucleons
    supernovae
    baryons
    neutrinos
    formulations
    evaluation
    scattering

    Keywords

    • Equation of state
    • Nuclear Abundances
    • Nuclear Pasta
    • Supernova

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Furusawa, S., Yamada, S., Sumiyoshi, K., & Suzuki, H. (2012). A new baryonic equation of state at sub-nuclear densities for core-collapse simulations. In AIP Conference Proceedings (Vol. 1484, pp. 369-371) https://doi.org/10.1063/1.4763423

    A new baryonic equation of state at sub-nuclear densities for core-collapse simulations. / Furusawa, Shun; Yamada, Shoichi; Sumiyoshi, Kohsuke; Suzuki, Hideyuki.

    AIP Conference Proceedings. Vol. 1484 2012. p. 369-371.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Furusawa, S, Yamada, S, Sumiyoshi, K & Suzuki, H 2012, A new baryonic equation of state at sub-nuclear densities for core-collapse simulations. in AIP Conference Proceedings. vol. 1484, pp. 369-371, International Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011, Wako, 11/11/14. https://doi.org/10.1063/1.4763423
    Furusawa S, Yamada S, Sumiyoshi K, Suzuki H. A new baryonic equation of state at sub-nuclear densities for core-collapse simulations. In AIP Conference Proceedings. Vol. 1484. 2012. p. 369-371 https://doi.org/10.1063/1.4763423
    Furusawa, Shun ; Yamada, Shoichi ; Sumiyoshi, Kohsuke ; Suzuki, Hideyuki. / A new baryonic equation of state at sub-nuclear densities for core-collapse simulations. AIP Conference Proceedings. Vol. 1484 2012. pp. 369-371
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