标题： 使用声学记录比较流星体发光效率模型 显示英文标题

标题： A Comparison of Fireball Luminous Efficiency Models using Acoustic Records

摘要： 火球的总能量通常通过光学测量获得，并假设一个发光效率值。声学能量测量提供了一种独立的能量估算方法。在这里，我们结合光学和声学方法来验证Borovička等人（2020）的发光效率模型。我们的目标是比较这些模型与流星体能量沉积的声学测量结果。采用McFadden等人（2021）的方法，我们确定了四种不同明亮火球的火球碎片事件和圆柱形冲击波的爆炸当量。我们使用MetSim软件（Vida等人，2023）对火球进行建模，并发现Borovička等人（2020）的模型在我们的三个碳质火球案例研究中提供了比两倍更好的一致性。主要例外是一个产生铁陨石的火球，其发光效率比用石质火球校准的模型预测高一个数量级。我们认为光学和声学能量之间的巨大差异可能是铁火球的特征，因此可以作为该种群的区分标志。 显示英文摘要

摘要： The total energy of a fireball is commonly obtained from optical measurements with an assumed value for luminous efficiency. Acoustic energy measurements offer an independent means of energy estimation. Here we combine optical and acoustic methods to validate the luminous efficiency model of Borovi\v{c}ka et al. (2020). Our goal is to compare these models with acoustic measurements of meteoroid energy deposition. Employing theoretical blast scaling laws following the approach of McFadden et al. (2021), we determine explosive yields for both fireball fragmentation events and cylindrical shocks for four different bright fireballs. We model fireballs using the MetSim software (Vida et al., 2023) and find that the Borovi\v{c}ka et al. (2020) model produces agreement better than a factor of two for our three chondritic fireball case studies. The major exception is an iron meteorite-producing fireball where the luminous efficiency is an order of magnitude higher than model predictions calibrated with stony fireballs. We suggest that large disparities between optical and acoustic energies could be a signature of iron fireballs and hence useful as a discriminant of that population.