Infrared Mapping of Carbon Monoxide on Mars

Details Infrared Mapping of Carbon Monoxide on Mars Infrared Mapping of Carbon Monoxide on Mars

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.2410r&link_type=abstract

American Astronomical Society, DPS meeting #39, #24.10; Bulletin of the American Astronomical Society, Vol. 39, p.455

Astronomy and Astrophysics

Astronomy

Scientific paper

A two-Dimensional map of carbon monoxide in Mars’ atmosphere was constructed using absorptions in the 2-0 vibrational band. Absorption lines R6 and R7 for 12C 16O were used to construct the map. Data were gathered using CSHELL, a ground-based echelle spectrograph (0.5 arc-sec slit width, RP 40,000) at NASA's IRTF. The spectrum was centered at 4285 cm-1 ( 2.3 μm). The slit was oriented North-South on Mars and sequentially positioned at points East to West across the planet; column densities were then obtained for points at 0.6 arc-sec (370 km, nadir) intervals in the N-S direction and 1.0 arc-sec in the E-W direction. Data were taken on July 6, 1999 from 3:35 UT to 4:10 UT, Ls at 112.15o. This work is part of an ongoing survey of the Martian atmosphere. In a previous study, the isotopic ratios of carbon monoxide were found to be in similar to their terrestrial ratios. These were taken using the 1-0 band near 4.7 μm and will also be presented.
We would like to acknowledge the administration and staff of NASA's IRTF for the use of the telescope and NSF's Planetary Astronomy Program which funded this project under the RUI program (grant #AST-0505765).

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