Academic Journal
Scattering of Superthermal Ions at Shocks: Dependence on Energy
| Title: | Scattering of Superthermal Ions at Shocks: Dependence on Energy |
|---|---|
| Authors: | Michael Gedalin, Natalia Ganushkina, Nikolai V. Pogorelov, Vadim Roytershteyn |
| Source: | The Astrophysical Journal, Vol 957, Iss 2, p 106 (2023) |
| Publisher Information: | IOP Publishing, 2023. |
| Publication Year: | 2023 |
| Collection: | LCC:Astrophysics |
| Subject Terms: | Shocks, Planetary bow shocks, Interplanetary shocks, Astrophysics, QB460-466 |
| More Details: | Diffusive shock acceleration requires the production of backstreaming superthermal ions (injection) as a first step. Such ions can be generated in the process of scattering of ions in the superthermal tail off the shock front. Knowledge of the scattering of high-energy ions is essential for matching conditions of upstream and downstream distributions at the shock transition. Here we analyze the generation of backstreaming ions as a function of their initial energy in a model stationary shock and in a similar rippled shock. Rippling substantially enhances ion reflection and the generation of backstreaming ions for slightly and moderately superthermal energies, and thus is capable of ensuring ion injection into a further diffusive shock acceleration process. For high-energy ions, there is almost no difference in the fraction of backstreaming ions produced and the ion distributions between the planar stationary shock and the rippled shock. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1538-4357 |
| Relation: | https://doaj.org/toc/1538-4357 |
| DOI: | 10.3847/1538-4357/ad04dd |
| Access URL: | https://doaj.org/article/cac267d6add344f183a9a8fca873ebed |
| Accession Number: | edsdoj.267d6add344f183a9a8fca873ebed |
| Database: | Directory of Open Access Journals |
Be the first to leave a comment!