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  An acoustic mechanism for core-collapse supernova explosions

Burrows, A., Livne, E., Dessart, L., Ott, C. D., & Murphy, J. (2006). An acoustic mechanism for core-collapse supernova explosions. New Astronomy Reviews, 50(7-8), 469-648.

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資料種別: 会議論文

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Burrows.pdf (出版社版), 351KB
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https://hdl.handle.net/11858/00-001M-0000-0013-4CFF-2
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Burrows.pdf
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 作成者:
Burrows, Adam, 著者
Livne, Eli, 著者
Dessart, Luc, 著者
Ott, Christian D.1, 著者
Murphy, Jeremiah, 著者
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1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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 要旨: We present a new mechanism for core-collapse supernova explosions that relies upon acoustic power generated in the inner core as the driver. In our simulation using an 11-solar-mass progenitor, a strong advective-acoustic oscillation à la Foglizzo with a period of 25–30 ms arises 200 ms after bounce. Its growth saturates due to the generation of secondary shocks, and kinks in the resulting shock structure funnel and regulate subsequent accretion onto the inner core. However, this instability is not the primary agent of explosion. Rather, it is the acoustic power generated in the inner turbulent region and most importantly by the excitation and sonic damping of core g-mode oscillations. An l = 1 mode with a period of 3 ms grows to be prominent around 500 ms after bounce. The accreting protoneutron star is a self-excited oscillator. The associated acoustic power seen in our 11-solar-mass simulation is sufficient to drive the explosion. The angular distribution of the emitted sound is fundamentally aspherical. The sound pulses radiated from the core steepen into shock waves that merge as they propagate into the outer mantle and deposit their energy and momentum with high efficiency. The core oscillation acts like a transducer to convert accretion energy into sound. An advantage of the acoustic mechanism is that acoustic power does not abate until accretion subsides, so that it is available as long as it may be needed to explode the star.

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イベント名: Astronomy with Radioactivities. V
開催地: Clemson, SC, USA
開始日・終了日: 2005-09

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出版物名: New Astronomy Reviews
種別: 学術雑誌
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ページ: - 巻号: 50 (7-8) 通巻号: - 開始・終了ページ: 469 - 648 識別子(ISBN, ISSN, DOIなど): ISSN: 1387-6473