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  • Pluto's atmosphere in plateau phase since 2015 from a stellar occultation at Devasthal
    Sicardy, Bruno; Ashok, Nagarhalli M; Anandmayee Tej; Pawar, Ganesh; Deshmukh, Shishir; Deshpande, Ameya; Sharma, Saurabh; Desmars, Josselin; Assafin, Marcelo; Ortiz, Jose Luis; Benedetti-Rossi, Gustavo; Braga-Ribas, Felipe; Vieira-Martins, Roberto; Santos-Sanz, Pablo; Chand, Krishan; Bhatt, Bhuwan C

    arXiv.org, 12/2021
    Paper, Journal Article

    A stellar occultation by Pluto was observed on 6 June 2020 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 \(p_{\rm surf}= 12.23^{+0.65}_{-0.38} \)~\(\mu\)bar. This shows that Pluto's atmosphere is in a plateau phase since mid-2015, a result which is in excellent agreement with the Pluto volatile transport model of Meza et al. (2019}. This value does not support the pressure decrease reported by independent teams, based on occultations observed in 2018 and 2019, see Young et al. (2021} and Arimatu et al. (2020), respectively.

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