The red supergiant and supernova rate problems: Implications for core-collapse supernova physics

S. Horiuchi*, K. Nakamura, T. Takiwaki, K. Kotake, M. Tanaka


    研究成果: Article査読

    67 被引用数 (Scopus)


    Mapping supernovae to their progenitors is fundamental to understanding the collapse of massive stars.We investigate the red supergiant problem, which concerns why red supergiants with masses ~16-30M⊙ have not been identified as progenitors of Type IIP supernovae, and the supernova rate problem, which concerns why the observed cosmic supernova rate is smaller than the observed cosmic star formation rate. We find key physics to solving these in the compactness parameter, which characterizes the density structure of the progenitor. If massive stars with compactness above ξ 2.5 ~ 0.2 fail to produce canonical supernovae, (i) stars in the mass range 16-30M⊙ populate an island of stars that have high ξ 2.5 and do not produce canonical supernovae, and (ii) the fraction of such stars is consistent with the missing fraction of supernovae relative to star formation. We support this scenario with a series of two- and three-dimensional radiation hydrodynamics core-collapse simulations. Using more than 300 progenitors covering initial masses 10.8-75M⊙ and three initial metallicities, we show that high compactness is conducive to failed explosions. We then argue that a critical compactness of ~0.2 as the divide between successful and failed explosions is consistent with state-of-the-art three-dimensional core-collapse simulations. Our study implies that numerical simulations of core collapse need not produce robust explosions in a significant fraction of compact massive star initial conditions.

    ジャーナルMonthly Notices of the Royal Astronomical Society: Letters
    出版ステータスPublished - 2014

    ASJC Scopus subject areas

    • 天文学と天体物理学
    • 宇宙惑星科学


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