IR Spectroscopy of Comet 73P/Schwassmann-Wachmann 3 Post-Perihelion

Details IR Spectroscopy of Comet 73P/Schwassmann-Wachmann 3 Post-Perihelion IR Spectroscopy of Comet 73P/Schwassmann-Wachmann 3 Post-Perihelion

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30066s&link_type=abstract

Spitzer Proposal ID #30066

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Observations of recently-fragmented short-period comets provide an opportunity to sample material in these objects which has not been subjected to hundreds or thousands of years of exposure to the effects of solar radiation. Repeated passages into the inner solar system are expected to deplete the surface layers of the smallest dust grains, the very ones responsible for producing the detailed spectral features used for mineralogical analysis. We will continue to observe the three surviving remnants of comet 73P/Schwassmann-Wachmann 3, using the Infrared Spectrograph of the Spitzer Space Telescope. This continues our Cycle 2 program, but follows the objects into their post-perihelion phase. The observed characteristics of these fragments will be compared to those of both short-period and more dynamically new comets, with each other, and pre- & post-perihelion phases. Two existing grain models will be used to analyze the data, and work on a third one will begin.

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