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Infrared Spectra of Hydrated Magnesium Salts and their Role in the Search for Possible Life Conditions on Jupiter MoonsRecent observations from the Galileo satellite indicate that three of the Jupiter moons, Europa, Ganymede, and Callisto, may have subsurface oceans. Possible existence of such ocean and the nature of its composition are of great interest to astrobiologists. Data from Galileo's NIMS spectrometer indicate the possibility of hydrated salts on Europa's surface. To aid in the design of future missions, we investigated infrared spectra of MgSO4-nH20, n=1-3 using ab initio calculations. Geometry, energetics, dipole moments, vibrational frequencies and infrared intensities of pure and hydrated MgSO4 salts were determined. Significant differences are found between vibrational spectra of water molecules in complexes with MgSO4 and pure water. Some of the O-H stretching frequencies in the complexes are shifted to the red by up to 1,500 - 2,000 per cm. In addition, the SO2 stretching vibrations are found at lower frequency regions than the water vibrations. The calculated bands of water and SO2 fragments can serve as markers for the existence of the salt-water complexes on the surface of Jupiter's moon.
Document ID
20030001843
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Chaban, Galina
(NASA Marshall Space Flight Center Huntsville, AL United States)
Huo, Winifred M.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Lee, Timothy J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Kwak, Dochan
Date Acquired
August 21, 2013
Publication Date
August 15, 2002
Subject Category
Exobiology
Meeting Information
Meeting: 224th ACS Meeting
Location: Boston, MA
Country: United States
Start Date: August 20, 2002
Sponsors: American Chemical Society
Funding Number(s)
PROJECT: RTOP 274-50-00-06
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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