Mathematics – Logic
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011p%26ss...59..299v&link_type=abstract
Planetary and Space Science, Volume 59, Issue 2-3, p. 299-303.
Mathematics
Logic
1
Scientific paper
As universal products of biological processes, volatile organic sulfur compounds such as methyl mercaptan (CH3SH) may be essential in the search for signs of life on Mars and in exoplanet atmospheres. Methyl mercaptan is implicated in the origin of life at sites of low-temperature hydrothermal activity driven by serpentinization. Serpentinization may occur on Mars, in icy satellite oceans, and in other small wet bodies to a greater extent than on Earth, with important implications for life. We characterized absorption features in pure laboratory sample spectra of CH3SH using the Carbon Isotope Laser Spectrometer (CILS), an infrared (3.27μm) tunable diode laser spectrometer with capabilities nearly identical to those of the Tunable Laser Spectrometer (TLS) instrument on the Mars Science Laboratory. The molecular species proves detectable by CILS and TLS at the sensitivities approaching the level of parts per trillion with pre-concentration. These measurements demonstrate the possibility for detection of methyl mercaptan, with implications for its possible use as an in situ biosignature for Earth-based and extraterrestrial exploration.
Christensen Lance E.
Sung Keeyoon
Vance Steve
Webster Christopher R.
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