中国古代火流星记录的统计分析

本文对中国古代火流星记录,按年统计,用功率谱这一数学方法对它们进行分析。结果发现声音是衡量火流星起源的一个重要参数。有声音的火流星具有170.6±0.0,102.4±0.0,66.1±2.2,27.3±0.4,23.3±0.0,17.9±0.4,14.8±0.1,12.4±0.1,10.5±0.3年的可能周期。有声火流星与陨石坠落周期基本相同,是与陨石同源的,来自小行星带。我们认为影响有声火流星和陨石下落的因素是太阳辐射引起的Yarkovsky效应和木星摄动。有声火流星的10.5±0.3,23.2±0.0,66.1±2.2年周期与Yarkovsky效应有关。12.4±0.1,17.9±0.4,102.4±0.0,170.6±0.0周期与木星摄动有关。至于14.8±0.1,27.3±0.4的周期,可能是木星摄动与Yarkovsky效应联合作用或其他原因所致。

STATISTICAL ANALYSIS OF HISTORICAL DATA OF FIREBALL FALLS IN CHINA

An analysis of historical data of fireball falls in China is made using a mathematical method. The fall periods of sounding fireballs are found to be 170.6, 102.4, 66.1 = 2.2, 27.3 + 0.4, 23.3, 17.9 + 0.4, 14.8 + 0.1, 12.4 + 0.1, 10.5 + 0.3 (years). We reached two conclusions: First, the sounding fireballs, like meteorites, come from Apollo or Amor population. The factors which effect the fall of sounding fireballs are the Yarkovsky effect and the perturbation of Jupiter. Second, the soundless fireballs, like meteor showers, come from cometary material.