Pluto's atmosphere in plateau phase since 2015 from a stellar occultation at Devasthal
| Autor: | Sicardy, Bruno, Ashok, Nagarhalli M., Tej, Anandmayee, 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. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3847/2041-8213/ac4249 |
| Popis: | 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. Comment: 8 pages, 3 figures, revised and accepted version for ApJL |
| Databáze: | arXiv |
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