Exploring the spatial, temporal, and vertical distribution of methane in Pluto's atmosphere

  title={Exploring the spatial, temporal, and vertical distribution of methane in Pluto's atmosphere},
  author={Emmanuel Lellouch and Catherine de Bergh and Bruno Sicardy and François Forget and M. Vangvichith and Hans Ulrich Kaufl},
Lower atmosphere and pressure evolution on Pluto from ground-based stellar occultations, 1988–2016
Context. The tenuous nitrogen (N2) atmosphere on Pluto undergoes strong seasonal effects due to high obliquity and orbital eccentricity, and has recently (July 2015) been observed by the New Horizons
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 a
Detection of CO and HCN in Pluto’s atmosphere with ALMA
Pluto’s Atmosphere from Stellar Occultations in 2012 and 2013
We analyze two multi-chord stellar occultations by Pluto that were observed on 2012 July 18th and 2013 May 4th, and respectively monitored from five and six sites. They provide a total of fifteen
Observed glacier and volatile distribution on Pluto from atmosphere–topography processes
The model predicts N2 ice accumulation in the deepest low-latitude basin and the threefold increase in atmospheric pressure that has been observed to occur since 1988, and points to atmospheric–topographic processes as the origin of Sputnik Planitia’s N2 glacier.
New constraints on the surface of Pluto
Aims. Spectroscopic investigation of the surface of Pluto allows us to constrain the chemical properties of the volatile species of the solar system reservoir. This permits us to obtain the relative
Pluto’s Volatile and Climate Cycles on Short and Long Timescales
The volatiles on Pluto’s surface, N2, CH4, and CO, are present in its atmosphere as well. The movement of volatiles affects Pluto’s surface and atmosphere on multiple timescales. On diurnal


Pluto's lower atmosphere structure and methane abundance from high-resolution spectroscopy and stellar occultations
Context. Pluto possesses a thin atmosphere, primarily composed of nitrogen, in which the detection of methane has been reported. Aims. The goal is to constrain essential but so far unknown parameters
The Thermal Structure of Pluto's Atmosphere: Clear vs Hazy Models
The problem of Pluto's atmosphere thermal structure, as determined from the June 9, 1988 occultation data, is reassessed in the light of the detection of N2 and CO ices, along with CH4, on Pluto's
Distribution and Evolution of CH4, N2, and CO Ices on Pluto's Surface: 1995 to 1998
Abstract We present new near-infrared spectra of the planet Pluto obtained at Lowell Observatory on 83 nights during 1995–1998. The dense temporal sampling of our observations enables us to measure
Observations of the 2007 March 18 occultation of the star P445.3 (2UCAC 25823784; R = 15.3) by Pluto were obtained at high time resolution at five sites across the western United States and reduced
High resolution spectroscopy of Pluto’s atmosphere: detection of the 2.3 μm CH4 bands and evidence for carbon monoxide
The goal is to determine the composition of Pluto's atmosphere and to constrain the nature of surface-atmosphere interactions. We perform high--resolution spectroscopic observations in the
The recent expansion of Pluto's atmosphere
Observations at a variety of visible and infrared wavelengths of an occultation of a star by Pluto in August 2002 reveal evidence for extinction in Pluto's atmosphere and show that it has indeed changed, having expanded rather than collapsed, since 1988.
Pluto occultations are historically rare events, having been observed in 1988, 2002, 2006, and, as Pluto moves into the crowded Galactic plane, on several occasions in 2007. Here we present six