First in-situ detection of the cometary ammonium ion NH<sub>4</sub><sup>+</sup> (protonated ammonia NH<sub>3</sub> ) in the coma of 67P/C-G near perihelion - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2016

First in-situ detection of the cometary ammonium ion NH4+ (protonated ammonia NH3 ) in the coma of 67P/C-G near perihelion

Arnaud Beth
  • Fonction : Auteur
  • PersonId : 997517
Jean-Jacques Berthelier
  • Fonction : Auteur
  • PersonId : 968600
Léna Le Roy

Résumé

In this paper, we report the first in-situ detection of the ammonium ion NH4+ at 67P/Churyumov-Gerasimenko (67P/C-G) in a cometary coma, using the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) / Double Focusing Mass Spectrometer (DFMS). Unlike neutral and ion spectrometers onboard previous cometary missions, the ROSINA/DFMS spectrometer, when operated in ion mode, offers the capability to distinguish NH4+ from H2O+ in a cometary coma. We present here the ion data analysis of mass-to-charge ratios 18 and 19 at high spectral resolution and compare the results with an ionospheric model to put the these results into context. The model confirms that the ammonium ion NH4+ is one of the most abundant ion species, as predicted, in the coma near perihelion.
Fichier principal
Vignette du fichier
stw3370.pdf (1.9 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

insu-01427998 , version 1 (22-11-2020)

Identifiants

Citer

Arnaud Beth, Kathrin Altwegg, Hans Balsiger, Jean-Jacques Berthelier, Ursina Calmonte, et al.. First in-situ detection of the cometary ammonium ion NH4+ (protonated ammonia NH3 ) in the coma of 67P/C-G near perihelion. Monthly Notices of the Royal Astronomical Society, 2016, 462 (Suppl_1), pp.S562-S572. ⟨10.1093/mnras/stw3370⟩. ⟨insu-01427998⟩
146 Consultations
41 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More