RPC observation of the development and evolution of plasma interaction boundaries at 67P/Churyumov-Gerasimenko

Mandt, K. E.; Eriksson, A.; Edberg, N. J. T.; Koenders, C.; Broiles, T.; Fuselier, S. A.; Henri, P.; Nemeth, Z.; Alho, M.; Biver, N.; Beth, A.; Burch, J.; Carr, C.; Chae, K.; Coates, A. J.; Cupido, E.; Galand, M.; Glassmeier, K.-H.; Goetz, C.; Goldstein, R.; ... (2016). RPC observation of the development and evolution of plasma interaction boundaries at 67P/Churyumov-Gerasimenko. Monthly notices of the Royal Astronomical Society, 462(Suppl 1), S9-S22. Oxford University Press 10.1093/mnras/stw1736

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One of the primary objectives of the Rosetta Plasma Consortium, a suite of five plasma instruments on-board the Rosetta spacecraft, is to observe the formation and evolution of plasma interaction regions at the comet 67P/Churyumov-Gerasimenko (67P/CG). Observations made between 2015 April and 2016 February show that solar wind–cometary plasma interaction boundaries and regions formed around 2015 mid-April and lasted through early 2016 January. At least two regions were observed, separated by an ion-neutral collisionopause boundary. The inner region was located on the nucleus side of the boundary and was characterized by low-energy water-group ions, reduced magnetic field pileup and enhanced electron densities. The outer region was located outside of the boundary and was characterized by reduced electron densities, water-group ions that are accelerated to energies above 100 eV and enhanced magnetic field pileup compared to the inner region. The boundary discussed here is outside of the diamagnetic cavity and shows characteristics similar to observations made on-board the Giotto spacecraft in the ion pileup region at 1P/Halley. We find that the boundary is likely to be related to ion-neutral collisions and that its location is influenced by variability in the neutral density and the solar wind dynamic pressure.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Tzou, Chia-Yu

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

0035-8711

Publisher:

Oxford University Press

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

06 Jul 2017 11:20

Last Modified:

06 Jul 2017 11:20

Publisher DOI:

10.1093/mnras/stw1736

BORIS DOI:

10.7892/boris.97214

URI:

https://boris.unibe.ch/id/eprint/97214

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