Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Meyrand, Romain"'
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
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
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
Autor:
Bowen, Trevor A., Chandran, Benjmin D. G., Squire, Jonathan, Bale, Stuart D., Duan, Die, Klein, Kristopher G., Larson, Davin, Mallet, Alfred, McManus, Michael D., Meyrand, Romain, Verniero, Jaye L., Woodham, Lloyd D.
The dissipation of magnetized turbulence is an important paradigm for describing heating and energy transfer in astrophysical environments such as the solar corona and wind; however, the specific collisionless processes behind dissipation and heating
Externí odkaz:
http://arxiv.org/abs/2111.05400
Autor:
Squire, Jonathan, Meyrand, Romain, Kunz, Matthew W., Arzamasskiy, Lev, Schekochihin, Alexander A., Quataert, Eliot
The fast solar wind's high speeds and nonthermal features require that significant heating occurs well above the Sun's surface. Two leading theories seem incompatible: low-frequency "Alfv\'enic" turbulence, which transports energy outwards and is obs
Externí odkaz:
http://arxiv.org/abs/2109.03255