Near-Infrared Spectra of Centaurs and Kuiper Belt Objects

Details Near-Infrared Spectra of Centaurs and Kuiper Belt Objects Near-Infrared Spectra of Centaurs and Kuiper Belt Objects

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aj....135...55b&link_type=abstract

The Astronomical Journal, Volume 135, Issue 1, pp. 55-67 (2008).

Astronomy and Astrophysics

Astronomy

30

Infrared: Solar System, Kuiper Belt, Minor Planets, Asteroids

Scientific paper

We present here an extensive survey of near-infrared (NIR) spectra of Kuiper belt objects (KBOs) and Centaurs taken with the Keck I Telescope. We find that most spectra in our sample are well characterized by a combination of water ice and a featureless continuum. A comparative analysis reveals that the NIR spectral properties have little correlation to the visible colors or albedo, with the exception of the fragment KBOs produced from the giant impact on 2003 EL61. The results suggest that the surface composition of KBOs is heterogeneous, though the exposure of water ice may be controlled by geophysical processes. The Centaurs also display diverse spectral properties, but the source of the variability remains unclear. The results for both the KBOs and the Centaurs point to inherent heterogeneity in either the processes acting on these objects or materials from which they formed.

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