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Possible complex organic compounds on Mars.
K Kobayashi1, T Sato, S Kajishima
1Faculty of Engineering, Yokohama National University, Hodogaya-ku, Japan.
Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1997
Summary
Primitive Mars may have formed organic compounds similar to early Earth, potentially preserved today. Researchers simulated Martian conditions, finding complex "amino acid precursors" crucial for future Mars exploration.
Area of Science:
- Astrobiology and Planetary Science
- Organic Geochemistry
Background:
- Primitive Mars may have possessed environments conducive to life, similar to early Earth.
- Organic compounds, essential for life's origin, could have formed and persisted on Mars.
Purpose of the Study:
- To investigate the potential for organic compound formation on primitive and present-day Mars.
- To identify and characterize organic molecules that could serve as biosignatures.
Main Methods:
- Simulated Martian atmospheric conditions (CO2, CO, N2, H2O) were subjected to high-energy proton irradiation.
- Volatile and non-volatile products were analyzed, including detection of hydrogen cyanide and formaldehyde.
- Complex organic molecules, termed "amino acid precursors," were identified using cation-exchange High-Performance Liquid Chromatography (HPLC).
Main Results:
- Formation of hydrogen cyanide and formaldehyde observed under simulated Martian conditions.
- Production of yellow-brown, water-soluble non-volatile substances yielding amino acids upon acid hydrolysis.
- Identified "amino acid precursors" as complex compounds, not simple molecules, eluting earlier than free amino acids in HPLC.
Conclusions:
- Primitive Mars had the potential to generate complex organic molecules necessary for life.
- These complex organic compounds are significant targets for future Mars missions.
- Developing strategies for detecting these complex organics on Mars is crucial for astrobiological exploration.