Plasma characterization at comet 67P between 2 and 4 AU from the Sun with the RPC-MIP instrument - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2020

Plasma characterization at comet 67P between 2 and 4 AU from the Sun with the RPC-MIP instrument

Résumé

The plasma of comet 67P/Churyumov Gerasimenko is analyzed based on the RPC-MIP mutual impedance probe data of the Rosetta mission. Numerical simulations of the RPC-MIP instrumental response considering two populations of electrons were t on experimental responses acquired from January to September 2016 to extract the electron densities and temperatures. A time-tracking of the plasma parameters was performed, leading to the identi cation of a cold and a warm population of electrons during the period of interest. The respective densities and temperatures lie in the ranges [100 ; 1000] cm−3 and [0.05 ; 0.3] eV for the cold electrons and in the ranges [50 ; 500] cm−3 and [2 ; 10] eV for the warm electrons. Warm electrons most of the time made up between 10% and 30% of the whole population, while the temperature ratio between warm and cold electrons lay mostly between 30 and 70 during the period we studied. The uctuation range of the plasma parameters, that is, the electron densities and temperatures, appears to have remained rather constant during the last nine months of the mission. We take the limitations of the instrument that are due to the experimental noise into account in our discussion of the results.
Fichier principal
Vignette du fichier
aa37571-20.pdf (2.17 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

insu-02610363 , version 1 (02-06-2020)

Identifiants

Citer

Gaëtan Wattieaux, Pierre Henri, Nicolat Gilet, Xavier Vallières, Jan Deca. Plasma characterization at comet 67P between 2 and 4 AU from the Sun with the RPC-MIP instrument. Astronomy and Astrophysics - A&A, 2020, 638, A124 (11 p.). ⟨10.1051/0004-6361/202037571⟩. ⟨insu-02610363⟩
93 Consultations
68 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More