Near-Infrared Spectroscopy of the R Impact Site of Comet Shoemaker-Levy 9

Details Near-Infrared Spectroscopy of the R Impact Site of Comet Shoemaker-Levy 9 Near-Infrared Spectroscopy of the R Impact Site of Comet Shoemaker-Levy 9

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.3305k&link_type=abstract

American Astronomical Society, 186th AAS Meeting, #33.05; Bulletin of the American Astronomical Society, Vol. 27, p.858

Astronomy and Astrophysics

Astronomy

Scientific paper

We present 2.20--2.41 microns spectroscopy of the R event of Comet Shoemaker-Levy 9, spanning approximately 45 minutes prior, during, and after the impact. We model the spectra with temporally variable column abundances of mainly CH4 and CO. The CO 2--0 bandhead is visible during and shortly after the impact event, implying temperatures >= 2000 K. The 3--1 and 4--2 CO bandheads are possibly present in some spectra, blended with CH4 lines. Therefore some of the CO could have reached temperatures >= 3000 K. Absorption on the red side of the 2--0 bandhead by cooler (T ~ 1000 K) CO is also evident. This research was sponsored by the NASA Planetary Astronomy Program under grant NAGW 3415.

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