New study shows direct detection of strong electron cooling around a comet. Strong electron cooling on the neutral gas in cometary comae has been predicted for a long time, but now first actual measurements of low electron temperature were detected.
Comets are mainly composed of dusty ices originally from the young solar system. Most comets are located in the outer solar system far from the Sun and Earth, where no processes change their composition over long periods of time. Studying comets gives information about conditions when the planets and the solar system was forming. In this work observations of electrically charged particles from Rosetta's LAP instrument were analyzed. Finnish Meteorological Institute has participated in the LAP instrument as well as several other instruments on the Rosetta orbiter and the Philae lander.
The Finnish Meteorological Institute is a leading expert in meteorology, air quality, climate change, earth observation, marine and arctic research areas. FMI is in a unique position to study various themes of climate change in the Northern context.
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