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The Potential for Organic Synthesis in the Ocean of Enceladus

文献类型：期刊论文

作者Liu, Can5; Xu, Weiming5; Zhang, Zongbin5; Robinson, Kirt4; Lau, Maggie3; Huang, Fang; Huang, Fang2,5; Glein, Christopher R.1; Hao, Jihua5
刊名ASTROPHYSICAL JOURNAL
出版日期2024-08-01
卷号971期号:1页码:17
ISSN号0004-637X
DOI10.3847/1538-4357/ad534f
英文摘要The Cassini spacecraft detected a soup of organics in the plume of Saturn's moon Enceladus. Those compounds could provide building blocks for the potential emergence or sustenance of microbial life in Enceladus' subsurface ocean. However, the sources and stabilities of organics in Enceladus' ocean are still poorly understood. Here, we perform nonequilibrium thermodynamic calculations to assess the energetics of abiotic synthesis for a broad spectrum of small organic molecules under both cold oceanic and hydrothermal conditions on Enceladus. Most of the organics that we studied are thermodynamically favorable to synthesize at micromolal dissolved concentrations over wide ranges of pH (8.5-11) and redox conditions. This suggests that many of the organic compounds detected by Cassini may be derived from reactions of CO2 and H2. However, some widely assumed precursors of biomolecules, such as formaldehyde, hydrogen cyanide, and acetylene, are found to be unstable and therefore unfavorable to be synthesized. We found that higher temperatures also seem to favor the synthesis of organic species under Enceladus hydrothermal conditions. Detection of thermodynamically unstable species in the plume might reflect artifacts introduced during high-speed spacecraft flybys and/or active synthesis via degradation of primordial chondritic organics, or biological activities.
WOS关键词MOLAL THERMODYNAMIC PROPERTIES ; SURFACE-INDUCED DISSOCIATION ; GROUP-CONTRIBUTION VALUES ; TRANSPORT-PROPERTIES ; HYDROGEN-CYANIDE ; HIGH-PRESSURES ; AMINO-ACIDS ; PREBIOTIC SYNTHESIS ; ABIOTIC SYNTHESIS ; ENERGY YIELDS
资助项目Changjiang Scholars Program of China ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; University of Science and Technology of China Research Funds of the Double First-Class Initiative ; CIFAR Azrieli Global Scholarship ; SwRI IRD grant[15-R6248] ; NASA[80NSSC19K0611] ; Heising-Simons grant[2023-4657] ; NASA Habitable Worlds[80NSSC20K1408] ; NASA Interdisciplinary Consortia for Astrobiology Research[80NSSC21K1402] ; NASA Postdoctoral Program at Woods Hole Oceanographic Institution
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001284463900001
出版者IOP Publishing Ltd
资助机构Changjiang Scholars Program of China ; Chinese Academy of Sciences Pioneer Hundred Talents Program ; University of Science and Technology of China Research Funds of the Double First-Class Initiative ; CIFAR Azrieli Global Scholarship ; SwRI IRD grant ; NASA ; Heising-Simons grant ; NASA Habitable Worlds ; NASA Interdisciplinary Consortia for Astrobiology Research ; NASA Postdoctoral Program at Woods Hole Oceanographic Institution
源URL[http://ir.idsse.ac.cn/handle/183446/11478]  
专题深海科学研究部_地外海洋系统研究室
通讯作者Glein, Christopher R.
作者单位1.Southwest Res Inst, Space Sci Div, Space Sect, San Antonio, TX 78238 USA
2.CSIRO Mineral Resources, Kensington, WA 6151, Australia
3.Chinese Acad Sci, Lab Extraterr Ocean Syst, Inst Deep Sea Sci & Engn, Sanya 572000, Hainan, Peoples R China
4.Arizona State Univ, Beyond Ctr, Tempe, AZ 85287 USA
5.Univ Sci & Technol China, Sch Earth & Space Sci, Deep Space Explorat Lab, State Key Lab Lithospher & Environm Coevolut, Hefei 230026, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Can,Xu, Weiming,Zhang, Zongbin,et al. The Potential for Organic Synthesis in the Ocean of Enceladus[J]. ASTROPHYSICAL JOURNAL,2024,971(1):17.
APA Liu, Can.,Xu, Weiming.,Zhang, Zongbin.,Robinson, Kirt.,Lau, Maggie.,...&Hao, Jihua.(2024).The Potential for Organic Synthesis in the Ocean of Enceladus.ASTROPHYSICAL JOURNAL,971(1),17.
MLA Liu, Can,et al."The Potential for Organic Synthesis in the Ocean of Enceladus".ASTROPHYSICAL JOURNAL 971.1(2024):17.

入库方式： OAI收割

来源：深海科学与工程研究所

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