Detection of Additional Members of the 2003 EL61 Family via Infrared Spectroscopy

Details Detection of Additional Members of the 2003 EL61 Family via Infrared Spectroscopy Detection of Additional Members of the 2003 EL61 Family via Infrared Spectroscopy

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.3609s&link_type=abstract

American Astronomical Society, DPS meeting #40, #36.09; Bulletin of the American Astronomical Society, Vol. 40, p.462

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Scientific paper

We have acquired near-infrared spectra of Kuiper belt objects 2003 UZ117, 2005 CB79 and 2004 SB60 with NIRC on the Keck I Telescope. These objects are dynamically close to the core of the 2003 EL61 collisional family and were suggested to be potential fragments of this collision by Ragozzine & Brown 2007. We find that the spectra of 2003 UZ117 and 2005 CB79 both show the characteristic strong water ice absorption features seen exclusively on 2003 EL61, its largest satellite, and the six other known collisional fragments. In contrast, we find that the near infrared spectrum of 2004 SB60 is essentially featureless with a fraction of water ice of less than 5%. We discuss the implications of the discovery of these additional family members for understanding the formation and evolution of this collisional family in the outer solar system.

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