140 citations · 445 across the 25 of their papers we have counts for
25 papers
Ionosphere of Ganymede: Galileo observations versus test particle simulation
Arnaud Beth, Marina Galand, Ronan Modolo +3
In this paper, we model the plasma environment of Ganymede by means of a collisionless test particle simulation. By coupling the outputs from a DSMC simulation of Ganymede's exosph…
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…
Jupiter Science Enabled by ESA's Jupiter Icy Moons Explorer
Leigh N. Fletcher, Thibault Cavalié, Davide Grassi +47
ESA's Jupiter Icy Moons Explorer (JUICE) will provide a detailed investigation of the Jovian system in the 2030s, combining a suite of state-of-the-art instruments with an orbital…
Saturn's atmospheric response to the large influx of ring material inferred from Cassini INMS measurements
Julianne I. Moses, Zarah L. Brown, Tommi T. Koskinen +12
During the Grand Finale stage of the Cassini mission, organic-rich ring material was discovered to be flowing into Saturn's equatorial upper atmosphere at a surprisingly large rate…
Cometary Ionospheres: An Updated Tutorial
Arnaud Beth, Marina Galand, Cyril Simon Wedlund +1
This chapter aims at providing the tools and knowledge to understand and model the plasma environment surrounding comets in the innermost part near the nucleus. In particular, our…
Science goals and new mission concepts for future exploration of Titan's atmosphere geology and habitability: Titan POlar Scout/orbitEr and In situ lake lander and DrONe explorer (POSEIDON)
Sébastien Rodriguez, Sandrine Vinatier, Daniel Cordier +61
In response to ESA Voyage 2050 announcement of opportunity, we propose an ambitious L-class mission to explore one of the most exciting bodies in the Solar System, Saturn largest m…
Energy deposition in Saturn's equatorial upper atmosphere
J. M. Chadney, T. T. Koskinen, X. Hu +6
We construct Saturn equatorial neutral temperature and density profiles of H, H, He, and CH, between 10 and 1 bar using measurements from Cassini's Ion Neutral Mass…
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…
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…
Electron Dynamics near Diamagnetic Regions of Comet 67P/Churyumov-Gerasimenko
H. Madanian, J. L. Burch, A. I. Eriksson +8
The Rosetta spacecraft detected transient and sporadic diamagnetic regions around comet 67P/Churyumov-Gerasimenko. In this paper we present a statistical analysis of bulk and supra…
Principles Of Heliophysics: a textbook on the universal processes behind planetary habitability
Karel Schrijver, Fran Bagenal, Tim Bastian +59
Heliophysics is the system science of the physical connections between the Sun and the solar system. As the physics of the local cosmos, it embraces space weather and planetary hab…
The evolution of the electron number density in the coma of comet 67P at the location of Rosetta from 2015 November through 2016 March
Erik Vigren, Niklas J. T. Edberg, Anders I. Eriksson +6
A comet ionospheric model assuming the plasma to move radially outward with the same bulk speed as the neutral gas and not being subject to severe reduction through dissociative re…
Science goals and mission concepts for a future orbital and in situ exploration of Titan
Sébastien Rodriguez, Sandrine Vinatier, Daniel Cordier +27
In this white paper, we present a cross-section of important scientific questions that remain partially or completely unanswered, ranging from Titan exosphere to the deep interior,…
Cometary Plasma Science -- A White Paper in response to the Voyage 2050 Call by the European Space Agency
Charlotte Götz, Herber Gunell, Martin Volwerk +27
Comets hold the key to the understanding of our solar system, its formation and its evolution, and to the fundamental plasma processes at work both in it and beyond it. A comet nuc…
AMBITION -- Comet Nucleus Cryogenic Sample Return (White paper for ESA's Voyage 2050 programme)
D. Bockelée-Morvan, G. Filacchione, K. Altwegg +27
This white paper proposes that AMBITION, a Comet Nucleus Sample Return mission, be a cornerstone of ESA's Voyage 2050 programme. We summarise some of the most important questions s…
Modelling H in planetary atmospheres: effects of vertical gradients on observed quantities
L. Moore, H. Melin, J. O'Donoghue +5
Since its discovery in the aurorae of Jupiter ~30 years ago, the H ion has served as an invaluable probe of giant planet upper atmospheres. However, the vast majority of…
Solar wind charge exchange in cometary atmospheres III. Results from the Rosetta mission to comet 67P/Churyumov-Gerasimenko
Cyril Simon Wedlund, Etienne Behar, Hans Nilsson +12
Solar wind charge-changing reactions are of paramount importance to the physico-chemistry of the atmosphere of a comet. The ESA/Rosetta mission to comet 67P/Churyumov-Gerasimenko (…
Solar System Ice Giants: Exoplanets in our Backyard
Abigail Rymer, Kathleen Mandt, Dana Hurley +110
Future remote sensing of exoplanets will be enhanced by a thorough investigation of our solar system Ice Giants (Neptune-size planets). What can the configuration of the magnetic f…
Effect of stellar flares on the upper atmospheres of HD 189733b and HD 209458b
J. M. Chadney, T. T. Koskinen, M. Galand +2
Stellar flares are a frequent occurrence on young low-mass stars around which many detected exoplanets orbit. Flares are energetic, impulsive events, and their impact on exoplaneta…
Cold and warm electrons at comet 67P
A. I. Eriksson, I. A. D. Engelhardt, M. Andre +20
Strong electron cooling on the neutral gas in cometary comae has been predicted for a long time, but actual measurements of low electron temperature are scarce. We present in situ…
Saturn's Ionosphere
Luke Moore, Marina Galand, Arvydas J. Kliore +2
This chapter summarizes our current understanding of the ionosphere of Saturn. We give an overview of Saturn ionospheric science from the Voyager era to the present, with a focus o…
EUV-driven ionospheres and electron transport on extrasolar giant planets orbiting active stars
J. M. Chadney, M. Galand, T. T. Koskinen +4
The composition and structure of the upper atmospheres of Extrasolar Giant Planets (EGPs) are affected by the high-energy spectrum of their host stars from soft X-rays to EUV. This…
Prediction of forbidden ultraviolet and visible emissions in comet 67P/Churyumov-Gerasimenko
Susarla Raghuram, Anil Bhardwaj, Marina Galand
Remote observation of spectroscopic emissions is a potential tool for the identification and quantification of various species in comets. CO Cameron band (to trace \cod) and atomic…
The EChO science case
Giovanna Tinetti, Pierre Drossart, Paul Eccleston +347
The discovery of almost 2000 exoplanets has revealed an unexpectedly diverse planet population. Observations to date have shown that our Solar System is certainly not representativ…