3-13 Micron Spectroscopy of Comet 73P/Schwassmann-Wachmann 3

Details 3-13 Micron Spectroscopy of Comet 73P/Schwassmann-Wachmann 3 3-13 Micron Spectroscopy of Comet 73P/Schwassmann-Wachmann 3

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.1209r&link_type=abstract

American Astronomical Society, DPS meeting #38, #12.09; Bulletin of the American Astronomical Society, Vol. 38, p.504

Astronomy and Astrophysics

Astronomy

3

Scientific paper

Observations of components B and C of Comet 73P/Schwassmann-Wachmann 3 were obtained in May 18 & 19, 2006 UT using The Aerospace Corporation's Broad-band Array Spectrograph System (BASS). Both objects were highly variable at the time of observation. The flux of C dropped by a factor of 3 between 1600 UT on 18 May and the same time a day later. On the latter day, C was seen to brighten by 1.8 times over the course of 2 hours, but with no significant change in spectral shape. Both comets exhibited a strong 10 micron silicate band of nearly identical structure, although the strength of the feature in B was consistently weaker than that seen in C. The strength of the silicate band in both objects was approximately 25% above the surrounding continuum, generally stronger than that seen in Jupiter family comets, but comparable to that seen in many Oort cloud object, such as C/2001 Q4 (NEAT). B may have possessed an emission feature near 3.3-3.4 microns that was weaker or absent in C. Observations were obtained using NASA's Infrared Telescope Facility, which is operated by the University of Hawaii under contract with the National Aeronautics and Space Administration.

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