论文标题
次级流星的观察性特征
Observational Signatures of Sub-Relativistic Meteors
论文作者
论文摘要
目前尚不清楚在高速上以超新星喷射降雨大于尘埃的固体颗粒是否大于灰尘。我们开发了一个流体动力和辐射模型，以探索$ \ gtrsim 1 \ mathrm {\; mm} $ sub-Relativistic流星。我们发现，在通过地球上层大气中通过的流星能量很大一部分为热等离子体缸的绝热膨胀提供了动力，从而引起了插射麦克风可检测到的声冲击。此外，一个由数百个全套光学摄像机组成的全球网络，其时间分辨率为$ \ lyssim 10^{ - 4} \ mathrm {\; s} $将能够检测$ \ gtrsim 1 \ mathrm {\; mm} $ sub-Relativistic流星。
It is currently unknown whether solid particles larger than dust from supernova ejecta rain down on Earth at high speeds. We develop a hydrodynamic and radiative model to explore the detectability of $\gtrsim 1 \mathrm{\; mm}$ sub-relativistic meteors. We find that a large fraction of the meteor energy during its passage through the Earth's upper atmosphere powers the adiabatic expansion of a hot plasma cylinder, giving rise to acoustic shocks detectable by infrasound microphones. Additionally, a global network of several hundred all-sky optical cameras with a time resolution of $\lesssim 10^{-4} \mathrm{\;s}$ would be capable of detecting $\gtrsim 1 \mathrm{\; mm}$ sub-relativistic meteors.
