Mid-IR Observations of Ethylene on Jupiter

P. V. Sada, P. N. Romani, D. E. Jennings, G. L. Bjoraker, R. Boyle, G. McCabe

Research output: Contribution to journalArticlepeer-review


Ethylene is an important species to our understanding of hydrocarbon photochemistry in the atmospheres of the giant planets. It also provides a sensitive probe of conditions at the 10-microbar level in Jupiter's atmosphere, a region that is strongly influenced by aurora. We performed high-resolution (λ /Δ λ ~ 2,000) spectral observations of C2H4 at 10.53 microns (949.5 cm-1) on Jupiter during June 2000 using Celeste, a Goddard-developed cryogenic echelle spectrometer, in conjunction with the 3.0-m IRTF at Mt. Kea in Hawai'i. Temperature-enhanced ethylene line emission was observed over aurora latitudes, particularly over the northern hemisphere "hot spot" longitude (LIII ~ 180o). We will present preliminary models for these observations using variations in the pressure-temperature profile, altitude-dependent hydrocarbon mixing ratios derived from recent photochemical models, and updated C2H4 line positions and strengths. This work is supported by the NASA Planetary Astronomy Program.
Original languageEnglish
JournalAmerican Astronomical Society, DPS meeting #50
Publication statusPublished - 1 Oct 2000
Externally publishedYes


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