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arXiv 2302.09280astro-ph.EPastro-ph.IMphysics.ao-phphysics.bio-ph
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高层大气中的微生物探测:相对速度过滤采样

Detecting microbiology in the upper atmosphere: relative-velocity filtered sampling

Arjun Berera, Daniel J. Brener, Charles S. Cockell

AI总结:

本研究从实践角度重新探索地球生物圈海拔上限,提出可利用甚低轨CubeSats、火箭载MAGIC采样器在中间层和低热层搜寻微生物,并设计基于尺寸与相对速度过滤的新型探测器以解决污染问题。

摘要:

本文旨在从实践角度重新探讨地球生物圈的海拔范围这一问题。针对中间层和低热层(因气象学界相比其他区域对其研究较少,俗称“忽略层”)中生物物质的搜寻工作,我们提出了多项不同的方案。研究表明,近期的技术进展,如运行在甚低地球轨道的CubeSats(立方体卫星),或更常规的方法,如搭载于火箭的MAGIC流星烟尘粒子采样器,都具备在“忽略层”采集生物物质的潜在可行性。本文讨论了污染问题,并提出了一种潜在解决方案:设计一种新型探测器,可依据粒子的尺寸及其与探测器的相对速度对粒子进行过滤。

英文摘要:

The purpose of this paper is to re-open from a practical perspective the question of the extent in altitude of the Earth's biosphere. We make a number of different suggestions for how searches for biological material could be conducted in the mesosphere and lower thermosphere, colloquially referred to as the ignoreosphere due to its lack of investigation in the meteorological community compared to other regions. Relatively recent technological advances such as CubeSats in Very Low Earth Orbit or more standard approaches such as the rocket borne MAGIC meteoric smoke particle sampler, are shown as potentially viable for sampling biological material in the ignoreosphere. The issue of contamination is discussed and a potential solution to the problem is proposed by the means of a new detector design which filters for particles based on their size and relative-velocity to the detector.

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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