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The Extra-Atmospheric Mass of Small Meteoroids f the Prairie and Canada Bolide Camera Networks

机译：草原和加拿大Bolide相机网络的小类流星的大气外质量

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摘要

The existing methods for determining the extra-atmospheric mass of meteor bodies from observations of their movement in the atmosphere allow a certain arbitrariness. Active attempts to overcome the discrepancy between the results of calculations based on different approaches often lead to physically incorrect conclusions. A way out is to laboriously accumulate the estimates and computation results and to consistently remove ambiguities. To correctly interpret the observed brightness of a meteor, one should use contemporary methods and the results of physical studies of the emitting gas. In the present work, the extra-atmospheric masses of small meteoroids of the Prairie and Canada bolide camera networks were calculated from the observed braking. It turned out that, in many cases, the conditions of movement of meteor bodies in the atmosphere corresponded to a free molecular airflow about a body. The so-called dynamic mass of the bodies was estimated from the real densities of the meteoroid material, which corresponded to monolithic water ice and stone, and for the proper values of the product of the drag coefficient and shape factor. When producing the trial function for the body trajectories in the "velocity-altitude" variables, we did not allow for fragmentation explicitly, since it is less probable for small meteoroids than for large ones. As before, our estimates differ substantially from the photometric masses published in the corresponding tables.
机译：现有的通过观测流星体在大气中运动来确定流星体大气外质量的方法具有一定的任意性。积极尝试克服基于不同方法的计算结果之间的差异，通常会导致物理上不正确的结论。一种解决方法是费力地累积估计和计算结果，并始终消除歧义。为了正确解释流星观测到的亮度，应该使用当代方法和对排放气体进行物理研究的结果。在目前的工作中，从观测到的制动中计算出了草原和加拿大土流星照相机网络的小流星体的大气外质量。事实证明，在许多情况下，流星体在大气中的运动条件对应于围绕体的自由分子气流。根据流星体材料的实际密度（对应于整体式水冰和石头）以及阻力系数和形状因数乘积的适当值，估算了所谓的物体的动态质量。当在“速度-高度”变量中为人体轨迹生成试验函数时，我们没有明确允许碎片化，因为小流星体的可能性比大流星体的可能性小。和以前一样，我们的估计与相应表中发布的光度质量有很大不同。

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  • 来源
    《Solar system research》 |2008年第2期|p.111-117|共7页
  • 作者

    N. V. Popelenskaya; V. P. Stulov;

  • 作者单位

    Institute of Mechanics, Moscow State University, Michurinskii pr. I, Moscow, 117192 Russia;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 天文学;
  • 关键词

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