تقرير
Supermagnetosonic jets behind a collisionless quasi-parallel shock
| العنوان: | Supermagnetosonic jets behind a collisionless quasi-parallel shock |
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| المؤلفون: | Hietala, H., Laitinen, T. V., Andréeová, K., Vainio, R., Vaivads, A., Palmroth, M., Pulkkinen, T. I., Koskinen, H. E. J., Lucek, E. A., Rème, H. |
| سنة النشر: | 2009 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Plasma Physics, Physics - Space Physics |
| الوصف: | The downstream region of a collisionless quasi-parallel shock is structured containing bulk flows with high kinetic energy density from a previously unidentified source. We present Cluster multi-spacecraft measurements of this type of supermagnetosonic jet as well as of a weak secondary shock front within the sheath, that allow us to propose the following generation mechanism for the jets: The local curvature variations inherent to quasi-parallel shocks can create fast, deflected jets accompanied by density variations in the downstream region. If the speed of the jet is super(magneto)sonic in the reference frame of the obstacle, a second shock front forms in the sheath closer to the obstacle. Our results can be applied to collisionless quasi-parallel shocks in many plasma environments. Comment: accepted to Phys. Rev. Lett. (Nov 5, 2009) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.103.245001 |
| URL الوصول: | http://arxiv.org/abs/0911.1687 |
| رقم الأكسشن: | edsarx.0911.1687 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.103.245001 |
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