An Extended MHD Study of the 16 October 2015 MMS Diffusion Region Crossing
| dc.contributor.author | TenBarge, J. M. | |
| dc.contributor.author | Ng, Jonathan | |
| dc.contributor.author | Juno, J. | |
| dc.contributor.author | Wang, L. | |
| dc.contributor.author | Hakim, A. H. | |
| dc.contributor.author | Bhattacharjee, A. | |
| dc.date.accessioned | 2021-07-27T19:07:23Z | |
| dc.date.available | 2021-07-27T19:07:23Z | |
| dc.date.issued | 2019-09-09 | |
| dc.description.abstract | The Magnetospheric Multiscale (MMS) mission has given us unprecedented access to high cadence particle and field data of magnetic reconnection at Earth's magnetopause. MMS first passed very near an X-line on 16 October 2015, the Burch event, and has since observed multiple X-line crossings. Subsequent 3-D particle-in-cell (PIC) modeling efforts of and comparison with the Burch event have revealed a host of novel physical insights concerning magnetic reconnection, turbulence-induced particle mixing, and secondary instabilities. In this study, we employ the Gkeyll simulation framework to study the Burch event with different classes of extended, multifluid magnetohydrodynamics (MHD), including models that incorporate important kinetic effects, such as the electron pressure tensor, with physics-based closure relations designed to capture linear Landau damping. Such fluid modeling approaches are able to capture different levels of kinetic physics in global simulations and are generally less costly than fully kinetic PIC. We focus on the additional physics one can capture with increasing levels of fluid closure refinement via comparison with MMS data and existing PIC simulations. In particular, we find that the ten-moment model well captures the agyrotropic structure of the pressure tensor in the vicinity of the X-line and the magnitude of anisotropic electron heating observed in MMS and PIC simulations. However, the ten-moment model is found to have difficulty resolving the lower hybrid drift instability, which plays a fundamental role in heating and mixing electrons in the current layer. | en_US |
| dc.description.sponsorship | The authors are grateful for fruitful discussions with Marc Swisdak, Ari Le, Mike Shay, and Paul Cassak. This research was supported by NSF Grants AGS-1338944 and AGS-1622306. This research also used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract DE-AC02-05CH11231. Data used in this manuscript are available online (http://arks.princeton.edu/ark:/88435/dsp011j92gb30r). | en_US |
| dc.description.uri | https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JA026731 | en_US |
| dc.format.extent | 14 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m20dhj-nt5w | |
| dc.identifier.citation | TenBarge, J. M. et al.; An Extended MHD Study of the 16 October 2015 MMS Diffusion Region Crossing; Journal of Geophysical Research : Space Physics, 124, 11, p 8474-8487, 9 September, 2019; https://doi.org/10.1029/2019JA026731 | en_US |
| dc.identifier.uri | https://doi.org/10.1029/2019JA026731 | |
| dc.identifier.uri | http://hdl.handle.net/11603/22176 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | American Geophysical Union | 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 | ©2018. American Geophysical Union. All Rights Reserved | |
| dc.title | An Extended MHD Study of the 16 October 2015 MMS Diffusion Region Crossing | en_US |
| dc.type | Text | en_US |