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arXiv 1801.06341astro-ph.EP
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岩石系外行星上的极端生命形式调查

Extremophile life-form survey on rocky exoplanets

Madhu Kashyap Jagadeesh

摘要:

在其他地方寻找不同的生命形式是天体物理学和天体生物学研究的迷人领域。根据NASA系外行星档案数据库,目前已发现近3500颗系外行星。地球相似性指数(ESI)定义为半径、密度、逃逸速度和地面温度的几何平均值,范围从0(与地球不同)到1(地球)。在这项研究中,岩石系外行星,适合岩石依赖极端微生物,如:Chroococcidiopsis和Acarosporamto被选择,可以潜在地生存被考虑。介绍了殖民相似性指数(CSI),并对1650个岩石系外行星进行了分析,CSI基本上代表了适合岩石极端微生物生存的类地行星,这些极端微生物可以在极端温度下生存(即像沙漠一样热,像冻土一样冷)。在这项工作中,可居住的系外行星被确认为即使这些岩石极端微生物也无法通过使用CSI度量工具生存。

英文摘要:

Search for different life-forms elsewhere is the fascinating area of research in astrophysics and astrobiology. Nearly 3500 exoplanets are discovered according to NASA exoplanet archive database. Earth Similarity Index (ESI) is defined as the geometrical mean of radius, density, escape velocity and surface temperature, ranging from 0 (dissimilar to Earth) to 1(Earth). In this research, rocky exoplanets that are suitable for rock dependent extremophiles, such as: Chroococcidiopsis and Acarosporamto are chosen, which can potentially survive are considered. The Colonizing Similarity Index (CSI) is introduced and analysed for 1650 rocky exoplanets, CSI is basically representing Earth-like planets that are suitable for rocky extremophiles which can survive in extreme temperatures (i.e. as hot as desert and cold as frozen lands). In this work the in-habitable exoplanets are recognised even for these rocky extremophiles to not potentially survive by using the CSI metric tool.

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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