Near-Infrared Spectroscopy of the Shoemaker-Levy 9 Impact Sites with UKIRT: CO Emission from the L Site and Additional 5 Micron Spectra

Details Near-Infrared Spectroscopy of the Shoemaker-Levy 9 Impact Sites with UKIRT: CO Emission from the L Site and Additional 5 Micron Spectra Near-Infrared Spectroscopy of the Shoemaker-Levy 9 Impact Sites with UKIRT: CO Emission from the L Site and Additional 5 Micron Spectra

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.4214b&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #42.14; Bulletin of the American Astronomical Society, Vol. 27, p.1339

Astronomy and Astrophysics

Astronomy

Scientific paper

CO emission lines in the 4.7 mu m fundamental vibrational band were detected from Jupiter at the Shoemaker-Levy 9 fragment L impact site on July 20, 1994 UT, up to 4 to 5 hours after impact. For an atmospheric model with a single temperature for the emitting CO, which is assumed to be in local thermodynamic equilibrium (LTE), the CO temperature is estimated to be T(CO)=280+/-10 K. For this case, the CO column density is N(CO)=1.2 x 10(17) cm(-2) and the estimated mass of CO in the L site is 1.6 x 10(13) g, with uncertainties of a factor ten. This amount of CO can be plausibly explained as coming from material (O and C) originally in the impactor, though Jovian C could also have contributed. Larger amounts of cool CO below the emitting CO could have been present. The possible departure of the CO vibrational level populations from LTE is discussed qualitatively. There were no discernable long-term changes in the CO line depths of impact sites vs. non-impact sites in the spectra obtained in this work.

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