Zobrazeno 1 - 10
of 369
pro vyhledávání: '"Meyrand, P."'
We argue that two prominent theories of ion heating in low-$\beta$ collisionless plasmas -- stochastic and quasi-linear heating -- represent similar physical processes in turbulence with different normalized cross helicities. To capture both, we prop
Externí odkaz:
http://arxiv.org/abs/2409.07015
The means by which the turbulent cascade of energy is dissipated in the solar wind, and in other astrophysical systems, is a major open question. It has recently been proposed that a barrier to the transfer of energy can develop at small scales, whic
Externí odkaz:
http://arxiv.org/abs/2407.10815
Autor:
Bowen, Trevor A., Vasko, Ivan Y., Bale, Stuart D., Chandran, Benjamin D. G., Chasapis, Alexandros, de Wit, Thierry Dudok, Mallet, Alfred, McManus, Michael, Meyrand, Romain, Pulupa, Marc, Squire, Jonathan
Circularly polarized, nearly parallel propagating waves are prevalent in the solar wind at ion-kinetic scales. At these scales, the spectrum of turbulent fluctuations in the solar wind steepens, often called the transition-range, before flattening at
Externí odkaz:
http://arxiv.org/abs/2406.10446
Understanding the partitioning of turbulent energy between ions and electrons in weakly collisional plasmas is crucial for the accurate interpretation of observations and modelling of various astrophysical phenomena. Many such plasmas are "imbalanced
Externí odkaz:
http://arxiv.org/abs/2404.09380
The breakdown of scale invariance in turbulent flows, known as multifractal scaling, is considered a cornerstone of turbulence. In solar wind turbulence, a monofractal behavior can be observed at electron scales, in contrast to larger scales where mu
Externí odkaz:
http://arxiv.org/abs/2312.14546
Publikováno v:
ApJL, 957 L30 (2023)
A likely candidate mechanism to heat the solar corona and solar wind is low-frequency "Alfv\'enic" turbulence sourced by magnetic fluctuations near the solar surface. Depending on its properties, such turbulence can heat different species via differe
Externí odkaz:
http://arxiv.org/abs/2308.13048
In magnetized, stratified astrophysical environments such as the Sun's corona and solar wind, Alfv\'enic fluctuations ''reflect'' from background gradients, enabling nonlinear interactions and thus dissipation of their energy into heat. This process,
Externí odkaz:
http://arxiv.org/abs/2308.10389
Autor:
Bowen, Trevor A., Bale, Stuart D., Chandran, Benjamin D. G., Chasapis, Alexandros, Chen, Christopher H. K., de Wit, Thierry Dudok, Mallet, Alfred, Meyrand, Romain, Squire, Jonathan
The dissipation of magnetized turbulence is fundamental to understanding energy transfer and heating in astrophysical systems. Collisionless interactions, such as resonant wave-particle process, are known to play a role in shaping turbulent astrophys
Externí odkaz:
http://arxiv.org/abs/2306.04881
Switchbacks -- rapid, large deflections of the solar wind's magnetic field -- have generated significant interest as possible signatures of the key mechanisms that heat the corona and accelerate the solar wind. In this context, an important task for
Externí odkaz:
http://arxiv.org/abs/2205.09455
Switchbacks -- abrupt reversals of the magnetic field within the solar wind -- have been ubiquitously observed by Parker Solar Probe (PSP). Their origin, whether from processes near the solar surface or within the solar wind itself, remains under deb
Externí odkaz:
http://arxiv.org/abs/2205.09446