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Hydrocarbons in the upper atmosphere of Saturn are known, from Voyager, ground-based, and early Cassini results, to vary in emission intensity with latitude. Of particular interest is the marked increase in hydrocarbon line intensity near the south pole during southern summer, as the increased line intensity cannot be simply explained by the increased temperatures observed in that region since the...
Ethylene (C 2 H 4 ) emission has been measured in the poles and equator of Jupiter. The 949 cm −1 spectra were recorded with a high resolution spectrometer at the McMath–Pierce telescope at Kitt Peak in October–November 1998 and at the Infrared Telescope Facility at Mauna Kea in June 2000. C 2 H 4 is an important product of methane chemistry in the outer planets...
We report here the first detection of mono-deuterated acetylene (acetylene-d1, C 2 HD) in Titan's atmosphere from the presence of two of its emission bands at 678 and 519 cm −1 as observed in CIRS spectral averages of nadir and limb observations taken between July 2004 and mid-2007. By using new laboratory spectra for this molecule, we were able to derive its abundance at different...
We have analyzed data recorded by the Composite Infrared Spectrometer (CIRS) aboard the Cassini spacecraft during the Titan flybys T0–T10 (July 2004–January 2006). The spectra characterize various regions on Titan from 70° S to 70° N with a variety of emission angles. We study the molecular signatures observed in the mid-infrared CIRS detector arrays (FP3 and FP4, covering roughly the 600–1500 cm...
We have performed high-resolution spectral observations at mid-infrared wavelengths of C 2 H 6 (12.16 μm), and C 2 H 2 (13.45 μm) on Saturn. These emission features probe the stratosphere of the planet and provide information on the hydrocarbon photochemical processes taking place in that region of the atmosphere. The observations were performed using our cryogenic...
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