Pluto’s Atmosphere in Plateau Phase Since 2015 from a Stellar Occultation at Devasthal

@article{Sicardy2021PlutosAI,
  title={Pluto’s Atmosphere in Plateau Phase Since 2015 from a Stellar Occultation at Devasthal},
  author={Bruno Sicardy and Nagarhalli M. Ashok and Anandmayee Tej and Ganesh Pawar and Shishir Deshmukh and Ameya Deshpande and Saurabh Sharma and Josselin Desmars and Marcelo Assafin and Jos{\'e} Luis Ortiz and Gustavo Benedetti-Rossi and Felipe Braga-Ribas and Roberto Vieira-Martins and Pablo Santos-Sanz and Krishan Chand and Bhuwan C. Bhatt},
  journal={The Astrophysical Journal Letters},
  year={2021},
  volume={923}
}
A stellar occultation by Pluto was observed on 2020 June 6 with the 1.3 m and 3.6 m telescopes located at Devasthal, Nainital, India, using imaging systems in the I and H bands, respectively. From this event, we derive a surface pressure for Pluto’s atmosphere of psurf=12.23−0.38+0.65 μbar. This shows that Pluto’s atmosphere has been in a plateau phase since mid-2015, a result which is in excellent agreement with the Pluto volatile transport model of Meza et al. This value does not support the… 
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References

SHOWING 1-10 OF 17 REFERENCES

Study of Pluto’s atmosphere based on 2020 stellar occultation light curve results

On 6 June 2020, Pluto’s stellar occultation was successfully observed at a ground-based observatory in Iran, and Pluto’s atmospheric parameters were investigated. We used an atmospheric model of…

Evidence for a rapid decrease of Pluto’s atmospheric pressure revealed by a stellar occultation in 2019

We report observations of a stellar occultation by Pluto on 2019 July 17. A single-chord high-speed (time resolution = 2 s) photometry dataset was obtained with a CMOS camera mounted on the Tohoku…

Large changes in Pluto's atmosphere as revealed by recent stellar occultations

Data from the first occultations by Pluto since 1988 are reported and it is found that, during the intervening 14 years, there seems to have been a doubling of the atmospheric pressure, a probable seasonal effect on Pluto.

VERTICAL STRUCTURE IN PLUTO'S ATMOSPHERE FROM THE 2006 JUNE 12 STELLAR OCCULTATION

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…

Pluto’s ephemeris from ground-based stellar occultations (1988–2016)

Context. From 1988 to 2016, several stellar occultations have been observed to characterise Pluto’s atmosphere and its evolution. From each stellar occultation, an accurate astrometric position of…

Evidence for a molecule heavier than methane in the atmosphere of Pluto

THE recent occultation of a 12th magnitude star by Pluto provided a unique opportunity for studying its atmosphere. Analyses of measurements made at the Hobart observatory in Australia and the Kuiper…

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 Horizons Observations of the Atmosphere of Pluto

New Horizons data provide a snapshot of the current state of Pluto's atmosphere. Winds are slow and mostly controlled by sublimation of surface ices. Molecular nitrogen is the primary constituent…

Radio occultation measurements of Pluto’s neutral atmosphere with New Horizons

The Pluto system: Initial results from its exploration by New Horizons

The New Horizons encounter revealed that Pluto displays a surprisingly wide variety of geological landforms, including those resulting from glaciological and surface-atmosphere interactions as well as impact, tectonic, possible cryovolcanic, and mass-wasting processes.