Publications (6)
The source of electrons at comet 67P
P. Stephenson, A. Beth, J. Deca +8
We examine the origin of electrons in a weakly outgassing comet, using Rosetta mission data and a 3D collisional model of electrons at a comet. We have calculated a new dataset of…
A fast bow shock location predictor-estimator from 2D and 3D analytical models: Application to Mars and the MAVEN mission
C. Simon Wedlund, M. Volwerk, A. Beth +5
We present fast algorithms to automatically estimate the statistical position of the bow shock from spacecraft data, using existing analytical two-dimensional (2D) and three-dimens…
Solar wind charge exchange in cometary atmospheres. II. Analytical model
Cyril Simon Wedlund, E. Behar, E. Kallio +7
Solar wind charge-changing reactions are of paramount importance to the physico-chemistry of the atmosphere of a comet because they mass-load the solar wind through an effective co…
ROSINA ion zoo at Comet 67P
A. Beth, K. Altwegg, H. Balsiger +9
The Rosetta spacecraft escorted Comet 67P/Churyumov-Gerasimenko for 2 years along its journey through the Solar System between 3.8 and 1.24~au. Thanks to the high resolution mass s…
Ion-neutral chemistry at icy moons: the case of Ganymede
A. Beth, M. Galand, X. Jia +1
Icy moons orbiting giant planets are often described as airless bodies though they host an exosphere where collisions between neutral species are scarce. In the case of Ganymede, t…
Multi-instrument analysis of far-ultraviolet aurora in the southern hemisphere of comet 67P/Churyumov-Gerasimenko
P. Stephenson, M. Galand, P. D. Feldman +9
Aims. We aim to determine whether dissociative excitation of cometary neutrals by electron impact is the major source of far-ultraviolet (FUV) emissions at comet 67P/Churyumov-Gera…