Pluto's Atmosphere in Plateau Phase Since 2015 from a Stellar Occultation at Devasthal - Observatoire de Paris
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.
Fichier principal
Vignette du fichier
Sicardy_2021_ApJL_923_L31.pdf (575.03 Ko) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

obspm-03600680 , version 1 (08-03-2022)

Licence

Identifiers

Cite

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⟩
24 View
35 Download

Altmetric

Share

More