Near-infrared spectral monitoring of Pluto’s ices: Spatial distribution and secular evolution

  title={Near-infrared spectral monitoring of Pluto’s ices: Spatial distribution and secular evolution},
  author={W. Grundy and C. Olkin and L. Young and M. Buie and E. Young},
Abstract We report results from monitoring Pluto’s 0.8 to 2.4 μm reflectance spectrum with IRTF/SpeX on 65 nights over the dozen years from 2001 to 2012. The spectra show vibrational absorption features of simple molecules CH4, CO, and N2 condensed as ices on Pluto’s surface. These absorptions are modulated by the planet’s 6.39 day rotation period, enabling us to constrain the longitudinal distributions of the three ices. Absorptions of CO and N2 are concentrated on Pluto’s anti-Charon… Expand
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Near-infrared spectral monitoring of Pluto’s ices II: Recent decline of CO and N2 ice absorptions
Abstract IRTF/SpeX observations of Pluto’s near-infrared reflectance spectrum during 2013 show vibrational absorption features of CO and N 2 ices at 1.58 and 2.15 μm, respectively, that are weakerExpand
The spectrum of Pluto, 0.40–0.93 μm - I. Secular and longitudinal distribution of ices and complex organics
Context. During the past 30 years the surface of Pluto has been characterized and its variability monitored through continuous nearinfrared spectroscopic observations. But in the visible range only aExpand
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Abstract From Earth based observations Pluto is known to be the host of N2, CH4 and CO ices and also a dark red material. Very limited spatial distribution information is available from rotationalExpand
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Near-infrared spectral monitoring of Triton with IRTF/SpeX II: Spatial distribution and evolution of ices
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The recent discovery of two large trans-Neptunian objects (TNOs) 2003 UB313 and 2005 FY9, with surface properties similar to those of Pluto, provides an exciting new laboratory for the study ofExpand
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Evidence of N2-ice on the surface of the icy dwarf Planet 136472 (2005 FY9)
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