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Impacts of Dust Grains Accelerated by Supernovae on the Moon
The Astrophysical Journal Letters ( IF 8.8 ) Pub Date : 2020-06-01 , DOI: 10.3847/2041-8213/ab93d5
Amir Siraj , Abraham Loeb

There is evidence that ejecta from nearby supernovae have rained down on Earth in the past. Supernovae can accelerate preexisting dust grains in the interstellar medium to speeds of ∼0.01 c . We investigate the survival and impact of dust grains from supernovae on the Moon, finding that supernova dust grains can form detectable tracks with widths of ∼0.01–0.07 μ m and depths of ∼0.1–0.7 mm in lunar rocks. These tracks could potentially shed light on the timings, luminosities, and directions of nearby supernovae.

中文翻译:

超新星加速尘埃对月球的影响

有证据表明,附近超新星的喷出物过去曾在地球上下过雨。超新星可以将星际介质中先前存在的尘埃粒子加速到〜0.01 c的速度。我们调查了超新星尘埃粒子在月球上的生存和影响,发现超新星尘埃粒子可以在月球岩石中形成可检测到的径迹,其宽度约为0.01-0.07μm,深度约为0.1-0.7 mm。这些轨道可能会揭示附近超新星的时间,亮度和方向。
更新日期:2020-06-01
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