WISE Observations of the Jupiter Trojan Clouds

Details WISE Observations of the Jupiter Trojan Clouds WISE Observations of the Jupiter Trojan Clouds

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.5302g&link_type=abstract

American Astronomical Society, DPS meeting #42, #53.02; Bulletin of the American Astronomical Society, Vol. 42, p.1072

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Scientific paper

The Wide-field Infrared Survey Explorer (WISE) started its all sky survey in early January 2010. It has a 40cm cryogenically-cooled telescope with four imagers capable of taking simultaneous exposures at 3.4, 4.6, 12 and 22 microns, with sensitivities several hundred times greater than previous surveys (Mainzer et al., 2006). As of early July, the spacecraft has surveyed 99% of the sky and has covered the entire leading and trailing Jupiter Trojan clouds in a unprecedented uniform fashion. Almost 1500 Trojans have been observed (more than one quarter of the known Trojan population),
compiling the largest set of mid-IR observations for this population.
Trojans are objects that are located in the L4 and L5 Lagrangian points of a planet's orbit and currently Jupiter is known to have almost four thousand such objects in its Trojan population. The size and relative distributions of the two clouds are still uncertain due to the limited area covered by current surveys, but current studies suggest that the number of Jupiter Trojans is about the same as that of the main belt asteroids of similar sizes (Dotto et al, 2008). The physical characteristics are even less understood, but show some similarities and differences with other populations of minor bodies in the outer Solar System. It is therefore important to compare the physical and dynamical properties of the Jupiter Trojans with those of the Centaurs, Trans-Neptunian Objects, and outer Dwarf Planets.
We will present preliminary data results for the Trojan population observed with WISE, looking at the albedo and diameter populations of the population as a whole, as well as the similarities and differences between the two clouds.

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