Hybrid modeling of cometary plasma environments. II: Remote-sensing of a cometary bow shock
Research output: Contribution to journal › Article
- University of Michigan, Ann Arbor
- University of Oslo
- Swedish Institute of Space Physics
- Luleå University of Technology
- Finnish Meteorological Institute
Aims. The aim is to investigate the possibility of using pickup ion signatures to infer the existence or nonexistence of a bow shock-like structure and possibly other large-scale plasma environment features.
Methods. A numerical plasma model in the hybrid plasma description was used to model the plasma environment of a comet. Simulated pickup ion spectra were generated for diﬀerent interplanetary magnetic ﬁeld conditions. The results were interpreted through test particle tracing in the hybrid simulation solutions.
Results. Features of the observed pickup ion energy spectrum were reproduced, and the model was used to interpret the observation to be consistent with a shock-like structure. We identify 1) a spectral break related to the bow shock, 2) a mechanism for generating the spectral break, and 3) a dependency of the e
energy of the spectral break on the interplanetary magnetic ﬁeld magnitude and bow shock standoﬀ distance.
|Number of pages||16|
|Journal||Astronomy & Astrophysics|
|Publication status||E-pub ahead of print - 27 Feb 2019|
|MoE publication type||A1 Journal article-refereed|
- Comets: General, comets: individual: 67P, Methods: numerical, Plasmas, shock waves, Techniques: miscellaneous