Multiwavelength observations have revealed that dense, confined circumstellar material (CCSM) commonly exists in the vicinity of supernova (SN) progenitors, suggesting enhanced mass losses years to centuries before their core collapse. Interacting SNe, which are powered or aided by interaction with the CCSM, are considered to be promising high-energy multimessenger transient sources. We present detailed results of broadband electromagnetic emission, following the time-dependent model proposed in the previous work on high-energy SN neutrinos [K. Murase, New prospects for detecting high-energy neutrinos from nearby supernovae, Phys. Rev. D 97, 081301 (2018)]. We investigate electromagnetic cascades in the presence of Coulomb losses, including inverse-Compton and synchrotron components that significantly contribute to MeV and high-frequency radio bands, respectively. We also discuss the application to SN 2023ixf.

中文翻译：

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作为高能多信使瞬变的相互作用超新星

多波长观测表明，致密的受限星周物质（CCSM）通常存在于超新星（SN）前身附近，这表明在其核心崩溃前数年至数世纪的质量损失有所增加。通过与 CCSM 相互作用提供动力或辅助的相互作用超新星被认为是有前途的高能多信使瞬态源。我们按照之前关于高能SN中微子的工作中提出的时间相关模型，提出了宽带电磁发射的详细结果[K.村濑，探测附近超新星高能中微子的新前景，物理学。修订版 D 97 , 081301 (2018)]。我们研究了存在库仑损耗的电磁级联，包括分别对 MeV 和高频无线电频段有显着贡献的逆康普顿和同步加速器组件。我们还讨论了 SN 2023ixf 的应用。