Cosmic Ray-driven Bioenergetics for Life in Molecular Clouds  

宇宙射线驱动的生物能量学机制

作　　者：FENG Lei 冯磊(中国科学院紫金山天文台暗物质与空间天文重点实验室,南京210023;南京大学—紫金山天文台“粒子-核-宇宙学联合研究中心”,南京210093)

机构地区：[1]Key Laboratory of Dark Matter and Space Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023 [2]Joint Center for Particle,Nuclear Physics and Cosmology,Nanjing University-Purple Mountain Observatory,Nanjing 210093

出　　处：《天文学报》2024年第6期26-31,共6页Acta Astronomica Sinica

基　　金：Supported by the National Key Research and Development Program of China(Grant No.2016YFA0400200);the National Natural Science Foundation of China(Grants No.11773075);the Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant No.2016288).

摘　　要：According to models such as panspermia or the Nebula-Relay hypothesis,the ancestors of life on Earth once lived in molecular clouds.Then what are the energy source and bioenergetics for such lifeforms?A new bioenergetic mechanism powered by cosmic ray ionization of hydrogen molecules is proposed and its relation with the origin of chemiosmosis is also discussed in this paper.Based on this mechanism,the Last Universal Common Ancestor may be a type of lifeform that utilizes hydrogen molecules as donors of electron transport chains.根据宇宙胚种论或星云中继假说等模型,地球上生命的祖先可能曾经生活在分子云中.那么这些生命体的能量来源和生物能量学机制是什么?提出了一种宇宙射线电离氢分子提供能量的生物能量学机制,认为它可能与化学渗透理论有关,或者它就是化学渗透理论的起源.基于这一机制,认为最后的普遍共同祖先是一种利用氢分子作为电子传输链供体的生命体.

关 键 词：ASTROBIOLOGY ASTROCHEMISTRY interstellar medium(ISM) NEBULAE cosmic ray 

分 类 号：P149[天文地球—天体物理]