Spiral mode of standing accretion shock instability in?core-collapse supernovae

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• 作者：Wakana Iwakami ; Naofumi Ohnishi ; Kei Kotake ; Shoichi Yamada and Keisuke Sawada
• 关键词：Supernovae ; Hydrodynamics ; Instability
• 刊名：Astrophysics and Space Science
• 出版年：2009
• 出版时间：August, 2009
• 年：2009
• 卷：322
• 期：1-4
• 页码：43-47
• 全文大小：1.0 MB

文摘

The study of standing accretion shock instability (SASI) in core-collapse supernova cores has been done with three-dimensional (3D) computer simulations. Rotations with various perturbations were introduced from outer boundary of an initial steady accreting flow. We found that one or two armed spiral accreting flow onto the proto-neutron star (PNS) is formed inside the shock wave depending on perturbations. The linear growth of spiral modes are clearly diagnosed by the mode analysis of the shock surface, and the lower m modes grow quickly in the linear regime.