Infrared Spectroscopy of Comet 73P/Schwassmann-Wachmann 3

Details Infrared Spectroscopy of Comet 73P/Schwassmann-Wachmann 3 Infrared Spectroscopy of Comet 73P/Schwassmann-Wachmann 3

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20205s&link_type=abstract

Spitzer Proposal ID #20205

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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 observe the three surviving remnants of comet 73P/Schwassmann-Wachmann 3, which fragmented in late 1995, using the Infrared Spectrograph of the Spitzer Space Telescope. We will use both "stare" and "spectral map" modes to uncover the size & mineralogy of these important remnants of the early solar nebula. The Spitzer observations will be supported by ground-based optical and infrared observations. The observed characteristics of these fragments will be compared to those of both short-period and more dynamically new comets. The spectra will be modeled using accurate radiative transfer models to be developed in the very near future.

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