Role of ion acoustic instability in magnetic reconnection
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917299410173952 |
|---|---|
| author | Li, Dion Liu, Zhuo Loureiro, Nuno F. |
| author_facet | Li, Dion Liu, Zhuo Loureiro, Nuno F. |
| contents | We report on a first-principles numerical study of magnetic reconnection in plasmas with different initial ion-to-electron temperature ratios. In cases where this ratio is significantly below unity, we observe intense wave activity in the diffusion region, driven by the ion-acoustic instability. Our analysis shows that the dominant macroscopic effect of this instability is to drive substantial ion heating. In contrast to earlier studies reporting significant anomalous resistivity, we find that anomalous contributions due to the ion-acoustic instability are minimal. These results shed light on the dynamical impact of this instability on reconnection processes, offering new insights into the fundamental physics governing collisionless reconnection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_08983 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Role of ion acoustic instability in magnetic reconnection Li, Dion Liu, Zhuo Loureiro, Nuno F. Plasma Physics Solar and Stellar Astrophysics Space Physics We report on a first-principles numerical study of magnetic reconnection in plasmas with different initial ion-to-electron temperature ratios. In cases where this ratio is significantly below unity, we observe intense wave activity in the diffusion region, driven by the ion-acoustic instability. Our analysis shows that the dominant macroscopic effect of this instability is to drive substantial ion heating. In contrast to earlier studies reporting significant anomalous resistivity, we find that anomalous contributions due to the ion-acoustic instability are minimal. These results shed light on the dynamical impact of this instability on reconnection processes, offering new insights into the fundamental physics governing collisionless reconnection. |
| title | Role of ion acoustic instability in magnetic reconnection |
| topic | Plasma Physics Solar and Stellar Astrophysics Space Physics |
| url | https://arxiv.org/abs/2505.08983 |