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Detection of additional members of the 2003 EL61 collisional family via near-infrared spectroscopy

Schaller, E. L. and Brown, M. E. (2008) Detection of additional members of the 2003 EL61 collisional family via near-infrared spectroscopy. Astrophysical Journal Letters, 684 (2). L107-L109. ISSN 2041-8205. doi:10.1086/592232.

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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 and Brown. 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.

Item Type:Article
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URLURL TypeDescription Paper
Brown, M. E.0000-0002-8255-0545
Additional Information:© 2008 The American Astronomical Society. Received 2008 July 13; accepted 2008 August 1; published 2008 August 22. We thank an anonymous referee for a helpful review. This research is supported by NASA Planetary Astronomy grant NNG05GI02G. The data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.
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W. M. Keck FoundationUNSPECIFIED
Subject Keywords:infrared: solar system; Kuiper Belt
Issue or Number:2
Record Number:CaltechAUTHORS:SCHAapjl08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13593
Deposited By: Tony Diaz
Deposited On:12 May 2009 22:25
Last Modified:08 Nov 2021 22:39

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