Lower Hybrid Waves at Comet 67P/Churyumov-GerasimenkoShow others and affiliations
2017 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 469, p. S29-S38Article in journal (Refereed) Published
Abstract [en]
We investigate the generation of waves in the lower hybrid frequency range by density gradients in the near plasma environment of comet 67P/Churyumov–Gerasimenko. When the plasma is dominated by water ions from the comet, a situation with magnetized electrons and unmagnetized ions is favourable for the generation of lower hybrid waves. These waves can transfer energy between ions and electrons and reshape the plasma environment of the comet. We consider cometocentric distances out to a few hundred km. We find that when the electron motion is not significantly interrupted by collisions with neutrals, large average gradients within tens of km of the comet, as well as often observed local large density gradients at larger distances, are often likely to be favourable for the generation of lower hybrid waves. Overall, we find that waves in the lower hybrid frequency range are likely to be common in the near plasma environment.
Place, publisher, year, edition, pages
Oxford University Press, 2017. Vol. 469, p. S29-S38
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-218832DOI: 10.1093/mnras/stx868ISI: 000443940500003Scopus ID: 2-s2.0-85032338055OAI: oai:DiVA.org:kth-218832DiVA, id: diva2:1161528
Note
QC 20171206
2017-11-302017-11-302024-03-15Bibliographically approved