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arXiv 2003.05458astro-ph.EP
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流星体流的真实引力聚焦

Realistic gravitational focusing of meteoroid streams

Althea V. Moorhead, Tiffany D. Clements, Denis Vida

摘要:

由于被称为引力聚焦的现象,流星体流的数量密度和通量在大质量物体附近增强。最大的增强发生在大质量天体与辐射流的正对面:当观察者接近这个位置时,对于一个完全准直的辐射流,聚焦的程度是不受限制的。然而,真实的流星体流在辐射和速度上表现出一定的分散性,这将消除这种奇点。在本文中,我们推导出一个解析近似的平滑,可用于流星体环境模型,是基于实际测量的流星雨辐射色散。

英文摘要:

The number density and flux of a meteoroid stream is enhanced near a massive body due to the phenomenon known as gravitational focusing. The greatest enhancement occurs directly opposite the massive body from the stream radiant: as an observer approaches this location, the degree of focusing is unbound for a perfectly collimated stream. However, real meteoroid streams exhibit some dispersion in radiant and speed that will act to eliminate this singularity. In this paper, we derive an analytic approximation for this smoothing that can be used in meteoroid environment models and is based on real measurements of meteor shower radiant dispersion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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