Search Publications

Ion-Ion Cross-Field Instability of Lower Hybrid Waves in the Inner Coma of Comet 67P

Karlsson, Tomas; Stenberg Wieser, Gabriella; Odelstad, Elias +2 more

We show that an ion-ion cross-field streaming instability between cold newborn cometary ions and heated heavy ions that were picked up upstream is likely a contributing source of observed lower hybrid (LH) waves in the inner coma of comet 67P/Churyumov-Gerasimenko. Electric field oscillations in the LH frequency range are common here, and have pre…

Observations of a Solar Energetic Particle Event From Inside and Outside the Coma of Comet 67P

Coates, A. J.; Palmerio, E.; Jones, G. H. +12 more

We analyze observations of a solar energetic particle (SEP) event at Rosetta's target comet 67P/Churyumov-Gerasimenko during 6-10 March 2015. The comet was 2.15 AU from the Sun, with the Rosetta spacecraft approximately 70 km from the nucleus placing it deep inside the comet's coma and allowing us to study its response. The Eastern flank of an int…