Stellar core collapse with hadron-quark phase transition

Ken'Ichiro Nakazato, Kohsuke Sumiyoshi, Shoichi Yamada

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    Context. Hadronic matter undergoes a deconfinement transition to quark matter at high temperature and/or high density. It would be realized in collapsing cores of massive stars. Aims. In the framework of the MIT bag model, the ambiguities of the interaction are encapsulated in the bag constant. Some progenitor stars that invoke the core collapses explode as supernovae, and other ones become black holes. The fates of core collapses are investigated for various cases. Methods. Equations of state including the hadron-quark phase transition are constructed for the cases of the bag constant B = 90, 150, and 250 MeV fm-3. To describe the mixed phase, the Gibbs condition is used. Adopting the equations of state with different bag constants, the core collapse simulations are performed for the progenitor models with 15 and 40 M⊙. Results. If the bag constant is small, for example B = 90 MeV fm-3, the interval between the bounce and black hole formation is shortened drastically for the model with 40 M ⊙, and the second bounce revives the shock wave leading to explosion for the model with 15 M⊙.

    Original languageEnglish
    Article numberA50
    JournalAstronomy and Astrophysics
    Volume558
    DOIs
    Publication statusPublished - 2013

    Fingerprint

    stellar cores
    bags
    phase transition
    quarks
    equation of state
    equations of state
    shock wave
    explosion
    massive stars
    ambiguity
    supernovae
    explosions
    shock waves
    intervals
    stars
    simulation
    interactions

    Keywords

    • Black hole physics
    • Dense matter
    • Equation of state
    • Hydrodynamics
    • Methods: numerical
    • Supernovae: general

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Stellar core collapse with hadron-quark phase transition. / Nakazato, Ken'Ichiro; Sumiyoshi, Kohsuke; Yamada, Shoichi.

    In: Astronomy and Astrophysics, Vol. 558, A50, 2013.

    Research output: Contribution to journalArticle

    Nakazato, Ken'Ichiro ; Sumiyoshi, Kohsuke ; Yamada, Shoichi. / Stellar core collapse with hadron-quark phase transition. In: Astronomy and Astrophysics. 2013 ; Vol. 558.
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    abstract = "Context. Hadronic matter undergoes a deconfinement transition to quark matter at high temperature and/or high density. It would be realized in collapsing cores of massive stars. Aims. In the framework of the MIT bag model, the ambiguities of the interaction are encapsulated in the bag constant. Some progenitor stars that invoke the core collapses explode as supernovae, and other ones become black holes. The fates of core collapses are investigated for various cases. Methods. Equations of state including the hadron-quark phase transition are constructed for the cases of the bag constant B = 90, 150, and 250 MeV fm-3. To describe the mixed phase, the Gibbs condition is used. Adopting the equations of state with different bag constants, the core collapse simulations are performed for the progenitor models with 15 and 40 M{\^a}Š™. Results. If the bag constant is small, for example B = 90 MeV fm-3, the interval between the bounce and black hole formation is shortened drastically for the model with 40 M {\^a}Š™, and the second bounce revives the shock wave leading to explosion for the model with 15 M{\^a}Š™.",
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    N2 - Context. Hadronic matter undergoes a deconfinement transition to quark matter at high temperature and/or high density. It would be realized in collapsing cores of massive stars. Aims. In the framework of the MIT bag model, the ambiguities of the interaction are encapsulated in the bag constant. Some progenitor stars that invoke the core collapses explode as supernovae, and other ones become black holes. The fates of core collapses are investigated for various cases. Methods. Equations of state including the hadron-quark phase transition are constructed for the cases of the bag constant B = 90, 150, and 250 MeV fm-3. To describe the mixed phase, the Gibbs condition is used. Adopting the equations of state with different bag constants, the core collapse simulations are performed for the progenitor models with 15 and 40 M⊙. Results. If the bag constant is small, for example B = 90 MeV fm-3, the interval between the bounce and black hole formation is shortened drastically for the model with 40 M ⊙, and the second bounce revives the shock wave leading to explosion for the model with 15 M⊙.

    AB - Context. Hadronic matter undergoes a deconfinement transition to quark matter at high temperature and/or high density. It would be realized in collapsing cores of massive stars. Aims. In the framework of the MIT bag model, the ambiguities of the interaction are encapsulated in the bag constant. Some progenitor stars that invoke the core collapses explode as supernovae, and other ones become black holes. The fates of core collapses are investigated for various cases. Methods. Equations of state including the hadron-quark phase transition are constructed for the cases of the bag constant B = 90, 150, and 250 MeV fm-3. To describe the mixed phase, the Gibbs condition is used. Adopting the equations of state with different bag constants, the core collapse simulations are performed for the progenitor models with 15 and 40 M⊙. Results. If the bag constant is small, for example B = 90 MeV fm-3, the interval between the bounce and black hole formation is shortened drastically for the model with 40 M ⊙, and the second bounce revives the shock wave leading to explosion for the model with 15 M⊙.

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    KW - Equation of state

    KW - Hydrodynamics

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    KW - Supernovae: general

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