Magnetic reconnection and kinetic waves generated in the Earth's quasi-parallel bow shock
| dc.contributor.author | Bessho, N. | |
| dc.contributor.author | Chen, L.-J. | |
| dc.contributor.author | Wang, S. | |
| dc.contributor.author | Hesse, M. | |
| dc.contributor.author | Wilson III, L. B. | |
| dc.contributor.author | Ng, Jonathan | |
| dc.date.accessioned | 2021-07-27T17:30:01Z | |
| dc.date.available | 2021-07-27T17:30:01Z | |
| dc.date.issued | 2020-09-18 | |
| dc.description.abstract | Magnetic reconnection in quasi-parallel shocks, relevant to the Earth's bow shock, is studied by means of two-dimensional full particle-in-cell simulations. As the Alfvénic Mach number increases, the propagation direction of the waves excited in the transition region changes, and the shock becomes more turbulent with more reconnection sites. In the higher Mach number shock, abundant electron-only reconnection sites are generated with scales on the order of the ion skin depth or less. Non-reconnecting current sheets can also generate electron jets and energy dissipation can occur there as well. However, non-reconnecting current sheets with the magnetic field reversal typically show a smaller energy dissipation rate than reconnecting current sheets. In the shock transition region, two types of waves are responsible for driving reconnection: one has a wavelength around three ion skin depths (di), and the other has a wavelength less than 1 di. Electron and ion distribution functions show that in regions where the former type of waves is excited, there are two ion beams and a single-peaked electron distribution. In contrast, in regions where the latter type of waves is excited, there are multiple electron and ion beams. The waves propagating obliquely to the magnetic field bend the magnetic field lines, and magnetic reconnection occurs where oppositely directed field lines come into contact | en_US |
| dc.description.sponsorship | This work was supported by DOE Grant No. DESC0016278, NSF Grant Nos. AGS-1619584 and AGS-1552142, NASA Grant No. 80NSSC18K1369, and the NASA MMS project. This work was partially supported by the International Space Science Institute’s (ISSI) International Teams programme. Work at the University of Bergen was supported by the Research Council of Norway/CoE under Contract No. 223252/F50. | en_US |
| dc.description.uri | https://aip.scitation.org/doi/10.1063/5.0012443 | en_US |
| dc.format.extent | 21 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2ufil-3m2c | |
| dc.identifier.citation | Bessho, N. et al.; Magnetic reconnection and kinetic waves generated in the Earth's quasi-parallel bow shock; Physics of Plasmas 27, 092901, 18 September, 2020; https://doi.org/10.1063/5.0012443 | en_US |
| dc.identifier.uri | https://doi.org/10.1063/5.0012443 | |
| dc.identifier.uri | http://hdl.handle.net/11603/22166 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | AIP Publishing | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Goddard Planetary Heliophysics Institute (GPHI) | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | Magnetic reconnection and kinetic waves generated in the Earth's quasi-parallel bow shock | en_US |
| dc.type | Text | en_US |