Pluto's Atmosphere in Plateau Phase Since 2015 from a Stellar Occultation at Devasthal - Observatoire de Paris Access content directly
Journal Articles The Astrophysical journal letters Year : 2021

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

Abstract

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 ${p}_{\mathrm{surf}}={12.23}_{-0.38}^{+0.65}$ 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 pressure decrease reported by independent teams, based on occultations observed in 2018 and 2019 by Young et al. and Arimatsu et al., respectively.
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obspm-03600680 , version 1 (08-03-2022)

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Bruno Sicardy, Nagarhalli M. Ashok, Anandmayee Tej, Ganesh Pawar, Shishir Deshmukh, et al.. Pluto's Atmosphere in Plateau Phase Since 2015 from a Stellar Occultation at Devasthal. The Astrophysical journal letters, 2021, 923, 5 pp. ⟨10.3847/2041-8213/ac4249⟩. ⟨obspm-03600680⟩
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