U-band Photometry of Jovian Trojan Asteroids

Details U-band Photometry of Jovian Trojan Asteroids U-band Photometry of Jovian Trojan Asteroids

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..166y&link_type=abstract

NOAO Proposal ID #2009A-0166

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Scientific paper

Jovian Trojan asteroids occupy a unique transitional location in the Solar System, which make them the most interesting objects regarding the formation and evolution of the Solar System. It is widely believed that the Trojans are exclusively red bodies and their spectra are generally classified as P- and D-types. However, the recent Sloan Digital Sky Survey (SDSS) and spectroscopic observations show otherwise. Besides red color, significant fraction of Trojans show blue and neutral colors (compared with the Sun) in the visible. The observed blue and neutral colors may be associated with blue/UV absorbers (such as hydrated minerals), given that many minerals possess broad absorption bands in the blue and near ultraviolet portions of the spectra. However, only a handful of Trojans have been observed in the U-band while the majority remains largely unexplored. We propose to perform UBR photometry on Jovian Trojans to search for hydration-related UV absorption features via measuring U-B color index.

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