تقرير
Magnetic fields from Multiplicative Chaos
| العنوان: | Magnetic fields from Multiplicative Chaos |
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| المؤلفون: | Durrive, J. -B., Lesaffre, P., Ferrière, K. |
| سنة النشر: | 2020 |
| المجموعة: | Astrophysics Physics (Other) |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Solar and Stellar Astrophysics, Physics - Fluid Dynamics, Physics - Plasma Physics |
| الوصف: | An analytical model for fully developed three-dimensional incompressible turbulence was recently proposed in the hydrodynamics community, based on the concept of multiplicative chaos. It consists of a random field represented by means of a stochastic integral, which, with only a few parameters, shares many properties with experimental and numerical turbulence, including in particular energy transfer through scales (the cascade) and intermittency (non-Gaussianity) which is most conveniently controlled with a single parameter. Here, we propose three models extending this approach to MHD turbulence. Our formulae provide physically motivated 3D models of a turbulent velocity field and magnetic field coupled together. Besides its theoretical value, this work is meant to provide a tool for observers: a dozen of physically meaningful free parameters enter the description, which is useful to characterize astrophysical data. Comment: 22 pages, 9 figures, Accepted for publication in MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/staa1514 |
| URL الوصول: | http://arxiv.org/abs/2005.11972 |
| رقم الأكسشن: | edsarx.2005.11972 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/staa1514 |
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