上新世末超新星爆发时μ子辐射剂量与海洋巨型动物灭绝
Muon Radiation Dose and Marine Megafaunal Extinction at the end-Pliocene Supernova
摘要：
相当多的数据和分析支持在大约50 pc的距离上探测到一颗或多颗超新星，大约260万年前。这可能与当时的灭绝事件有关，并且是在星际介质中形成局部气泡的一系列爆炸的成员。我们建立在以前的工作，传播的μ介子通量从超新星发起的宇宙射线从表面到海洋深处。我们发现，μ介子的辐射剂量将超过目前深度达一公里的所有来源的总表面剂量，并将持续至少海洋巨型动物的一生。可以合理地假设，这种辐射负荷的增加可能导致了当时新记录的海洋巨型动物灭绝。
英文摘要：
Considerable data and analysis support the detection of one or more supernovae at a distance of about 50 pc, ~2.6 million years ago. This is possibly related to the extinction event around that time and is a member of a series of explosions which formed the Local Bubble in the interstellar medium. We build on previous work, and propagate the muon flux from supernova-initiated cosmic rays from the surface to the depths of the ocean. We find that the radiation dose from the muons will exceed the total present surface dose from all sources at depths up to a kilometer and will persist for at least the lifetime of marine megafauna. It is reasonable to hypothesize that this increase in radiation load may have contributed to a newly documented marine megafaunal extinction at that time.
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