Other
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30228h&link_type=abstract
Spitzer Proposal ID #30228
Other
Scientific paper
We propose to use IRS to observe emission spectra a suite of Trojan asteroids and extinct Jupiter family comets (JFCs). The goals of this work are to determine their surface compositions and to gain information on their surface microstructures; both factors influence the spectra of these airless bodies in the thermal infrared region covered by IRS. Trojan asteroids and extinct JFCs are thought, on dynamical grounds, to have originated in the outer Solar System, beyond Jupiter. The small bodies that accreted in the outer Solar System carry compositional information of the contents of the solar nebula in the region where silicates, organics, and ices inherited from the interstellar medium were largely preserved because of the low temperature. Because all but a very few of the objects that presently remain in the distant Solar System (the Kuiper Belt Objects) are too small and faint for mid-IR spectroscopy, the study the Trojans and JFCs is essential to characterize the compositions of a class of object that is otherwise unobservable.
Cruikshank Dale
Emery Joshua
Houck James R.
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