Evidence for auroral influence on Jupiter’s nitrogen and oxygen chemistry revealed by ALMA - Archive ouverte HAL Access content directly
Journal Articles Nature Astronomy Year : 2023

Evidence for auroral influence on Jupiter’s nitrogen and oxygen chemistry revealed by ALMA

R Moreno
E Lellouch
T Fouchet
J A Sinclair
V Hue
Nathalie Carrasco
Zoé Perrin
  • Function : Author
  • PersonId : 1101234

Abstract

The localized delivery of new long-lived species to Jupiter's stratosphere by comet Shoemaker-Levy 9 in 1994 opened a window to constrain Jovian chemistry and dynamics by monitoring the evolution of their vertical and horizontal distributions. However, the spatial distributions of CO and HCN, two of these long-lived species, had never been jointly observed at high latitudinal resolution. Atacama large millimeter/submillimeter array observations of HCN and CO in March 2017 show that CO was meridionally uniform and restricted to pressures lower than 3 ± 1 mbar. HCN shared a similar vertical distribution in the low-to mid-latitudes, but was depleted at pressures between 2 +2 −1 and 0.04 +0.07 −0.03 mbar in the aurora and surrounding regions, resulting in a drop by two orders of magnitude in column density. We propose that heterogeneous chemistry bonds HCN on large aurora-produced aerosols at these pressures in the Jovian auroral regions causing the observed depletion.
Fichier principal
Vignette du fichier
Cavalie2023b_Arxiv.pdf (9.58 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04168735 , version 1 (10-07-2024)

Identifiers

Cite

T Cavalié, L Rezac, R Moreno, E Lellouch, T Fouchet, et al.. Evidence for auroral influence on Jupiter’s nitrogen and oxygen chemistry revealed by ALMA. Nature Astronomy, 2023, 7, pp.1048-1055. ⟨10.1038/s41550-023-02016-7⟩. ⟨hal-04168735⟩
31 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More