Computer Science
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40389e&link_type=abstract
Spitzer Proposal ID #40389
Computer Science
Scientific paper
We propose to measure broadband fluxes of Kuiper Belt Objects (KBOs), Centaurs, and Trojan asteroids with IRAC in order to determine surface compositions. The value of IRAC is that its measurements of reflectance will 1) provide a far more sensitive search for ices than is possible at shorter wavelengths and 2) readily distinguish between candidates for the poorly understood 'dark material,' which is also not possible at shorter wavelengths. These capabilities critically address several longstanding questions in planetary science: What is the nature of the dark material that is nearly ubiquitous in the outer Solar System? Is it a single material or does its composition vary on different bodies in or from different locations? and What is the distribution of volatiles? For several objects, thermal emission will be detected in the 8.0-micron band. The simultaneous measurement with IRAC of both reflected and emitted flux will permit estimation of size and albedo for these objects. Our cycle-2 program to observe an initial set of outer Solar System objects has been tremendously successful, and this proposal builds on that success.
Cruikshank Dale
Dalle Ore Cristina
Eluszkiewicz Janusz
Emery Joshua
Fernandez Yanga
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