52 citations · 323 across the 14 of their papers we have counts for
14 papers
Cometary ion drift energy and temperature at comet 67P-Churyumov/Gerasimeko
Hayley N. Williamson, Annie Johansson, Romain Canu-Blot +4
The Ion Composition Analyzer (ICA) on the Rosetta spacecraft observed both the solar wind and the cometary ionosphere around comet 67P/Churyumov-Gerasimenko for nearly two years. H…
Simulating secondary electron and ion emission from the Cassini spacecraft in Saturn's ionosphere
Zeqi Zhang, Ravindra T. Desai, Oleg Shebanits +3
The Cassini spacecraft's Grand Finale flybys through Saturn's ionosphere provided unprecedented insight into the composition and dynamics of the gas giant's upper atmosphere and a…
Implications from secondary emission from neutral impact on Cassini plasma and dust measurements
Fredrik Leffe Johansson, Erik Vigren, Jack Hunter Waite +4
We investigate the role of secondary electron and ion emission from impact of gas molecules on the Cassini Langmuir Probe (RPWS-LP, or LP) measurements in the ionosphere of Saturn.…
Plasma densities, flow and Solar EUV flux at comet 67P - A cross-calibration approach
F. L. Johansson, A. I. Eriksson, E. Vigren +7
During its two-year mission at comet 67P, Rosetta nearly continuously monitored the inner coma plasma environment for gas production rates varying over three orders of magnitude, a…
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…
A charging model for the Rosetta spacecraft
F. L. Johansson, A. I. Eriksson, N. Gilet +5
Context. The electrostatic potential of a spacecraft, VS, is important for the capabilities of in situ plasma measurements. Rosetta has been found to be negatively charged during m…
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…
Solar flares observed by Rosetta at comet 67P
N. J. T. Edberg, F. L. Johansson, A. I. Eriksson +6
Context. The Rosetta spacecraft made continuous measurements of the coma of comet 67P/ Churyumov-Gerasimenko (67P) for more than two years. The plasma in the coma appeared very dyn…
Solar wind interaction with comet 67P: impacts of corotating interaction regions
Niklas J. T. Edberg, A. I. Eriksson, E. Odelstad +18
We present observations from the Rosetta Plasma Consortium of the effects of stormy solar wind on comet 67P/Churyumov-Gerasimenko. Four corotating interaction regions (CIRs), where…
CME impact on comet 67P/Churyumov-Gerasimenko
Niklas J. T. Edberg, M. Alho, M. André +22
We present Rosetta observations from comet 67P/Churyumov-Gerasimenko during the impact of a coronal mass ejection (CME). The CME impacted on 5-6 Oct 2015, when Rosetta was about 80…
Ion velocity and electron temperature inside and around the diamagnetic cavity of comet 67P
Elias Odelstad, Anders I. Eriksson, Fredrik L. Johansson +7
A major point of interest in cometary plasma physics has been the diamagnetic cavity, an unmagnetized region in the inner-most part of the coma. Here, we combine Langmuir and Mutua…
Rosetta photoelectron emission and solar ultraviolet flux at comet 67P
Fredrik L. Johansson, E. Odelstad, J. J. P. Paulsson +10
The Langmuir Probe instrument on Rosetta monitored the photoelectron emission cur- rent of the probes during the Rosetta mission at comet 67P/Churyumov-Gerasimenko, in essence acti…
Measurements of the electrostatic potential of Rosetta at comet 67P
Elias Odelstad, Gabriella Stenberg-Wieser, Martin Wieser +3
We present and compare measurements of the spacecraft potential (Vs/c) of the Rosetta space- craft throughout its stay in the inner coma of comet 67P/Churyumov-Gerasimenko, by the…
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…