NOAO > Observing Info > Approved Programs > 2008B-0137
|
NOAO > Observing Info > Approved Programs > 2008B-0137 |
|
PI: Bin Yang, Univ. of Hawaii, yangbin@ifa.hawaii.edu
Address: Institute for Astronomy, 2680 Woodlawn Dr., honolulu, Hawaii 96822, USA
CoI: David Jewitt, Institute for Astronomy, Univ. of Hawaii
Title: U-band Photometry of an Unusual Trojan Family
Abstract: It is widely believed that the Jovian Trojans are exclusively red bodies and their spectra are generally classified as P- and D-types. However, a Trojan family (the Eurybates family) was recently found to show unusual neutral colors in the optical. About 60% of family members show flat and featureless spectra, which are classified as C- types. Although Trojan asteroids are thought to be water rich, all published studies failed to detect any sign of the presence of water. Eurybates family members with flat spectra, may contain an important record of possible aqueous alteration, which can be investigated in the ultraviolet (UV). Unfortunately, available data on this family are limited to longward of 5000A and are not sufficient to be examined in the UV region. We propose to obtain U-band photometry on Eurybates Trojans to search for evidence of the presence of hydrated minerals.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
|
NOAO > Observing Info > Approved Programs > 2008B-0137 |
|