Resurrection of Nonthermal Emissions from Type Ib/c Supernova Remnants
Resurrection of Nonthermal Emissions from Type Ib/c Supernova Remnants
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DOI：
10.3847/1538-4357/ac3b49
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
H. Yasuda;Shiu-Hang Lee;K. Maeda
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作者：
H. Yasuda;Shiu-Hang Lee;K. Maeda
超新星遗迹（SNRs）是研究超新星（SN）爆炸机制、前身星以及宇宙射线加速之间联系的重要天体。超新星遗迹的非热辐射是探测其周围星周介质（CSM），进而研究大质量恒星的恒星演化和质量损失机制的一种有效且有前景的工具。在这项工作中，我们计算了Ib/c型超新星遗迹宽带非热辐射的时间演化，其星周介质结构源自它们前身星的质量损失历史。我们的结果预测，Ib/c型超新星遗迹在射电和γ射线波段的亮度会从在某一时期不可探测的暗淡状态过渡到重新变亮的阶段。这种过渡源于它们不均匀的星周介质结构，即超新星遗迹位于一个被高密度星风壳层和周围星际介质（ISM）环绕的低密度星风腔内部。对于在典型星际介质密度下演化的沃尔夫 - 拉叶星前身星，非热光度的“复苏”发生在约1000年时。结合安田等人最近报道的II型超新星遗迹演化的结果，这一结果有助于全面理解不同超新星前身星类型和年龄的超新星遗迹的非热辐射，通过纳入前身星真实的质量损失历史，这首次成为可能。
Supernova remnants (SNRs) are important objects in investigating the links among supernova (SN) explosion mechanism(s), progenitor stars, and cosmic-ray acceleration. Nonthermal emission from SNRs is an effective and promising tool for probing their surrounding circumstellar media (CSM) and, in turn, the stellar evolution and mass-loss mechanism(s) of massive stars. In this work, we calculate the time evolution of broadband nonthermal emissions from Type Ib/c SNRs, whose CSM structures are derived from the mass-loss history of their progenitors. Our results predict that Type Ib/c SNRs make a transition of brightness in radio and γ-ray bands from an undetectable dark for a certain period to a rebrightening phase. This transition originates from their inhomogeneous CSM structures in which the SNRs are embedded within a low-density wind cavity surrounded by a high-density wind shell and the ambient interstellar medium (ISM). The “resurrection” in nonthermal luminosity happens at an age of ∼1000 yr old for a Wolf-Rayet star progenitor evolved within a typical ISM density. Combining with the results of Type II SNR evolution recently reported by Yasuda et al., this result sheds light on a comprehensive understanding of nonthermal emissions from SNRs with different SN progenitor types and ages, which is made possible for the first time by the incorporation of realistic mass-loss histories of the progenitors.