Zobrazeno 1 - 10
of 620
pro vyhledávání: '"Howes, G."'
Publikováno v:
The Astrophysical Journal, 912:101 (2021)
We use fluctuating magnetic helicity to investigate the polarisation properties of Alfv\'enic fluctuations at ion-kinetic scales in the solar wind as a function of $\beta_p$, the ratio of proton thermal pressure to magnetic pressure, and $\theta_{vB}
Externí odkaz:
http://arxiv.org/abs/2003.09346
Akademický článek
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Autor:
TenBarge, J. M., Alexandrova, O., Boldyrev, S., Califano, F., Cerri, S. S., Chen, C. H. K., Howes, G. G., Horbury, T., Isenberg, P. A., Ji, H., Klein, K. G., Krafft, C., Kunz, M., Loureiro, N. F., Mallet, A., Maruca, B. A., Matthaeus, W. H., Meyrand, R., Quataert, E., Perez, J. C., Roberts, O. W., Sahraoui, F., Salem, C. S., Schekochihin, A. A., Spence, H., Squire, J., Told, D., Verscharen, D., Wicks, R. T.
This white paper submitted for 2020 Decadal Assessment of Plasma Science concerns the importance of multi-spacecraft missions to address fundamental questions concerning plasma turbulence. Plasma turbulence is ubiquitous in the universe, and it is re
Externí odkaz:
http://arxiv.org/abs/1903.05710
Publikováno v:
Nature Communications 10 740 (2019)
How turbulent energy is dissipated in weakly collisional space and astrophysical plasmas is a major open question. Here, we present the application of a field-particle correlation technique to directly measure the transfer of energy between the turbu
Externí odkaz:
http://arxiv.org/abs/1902.05785
Autor:
Verniero, J. L., Howes, G. G.
In space and astrophysical plasmas, violent events or instabilities inject energy into turbulent motions at large scales. Nonlinear interactions among the turbulent fluctuations drive a cascade of energy to small perpendicular scales at which the ene
Externí odkaz:
http://arxiv.org/abs/1712.08751
In space and astrophysical plasmas, turbulence is responsible for transferring energy from large scales driven by violent events or instabilities, to smaller scales where turbulent energy is ultimately converted into plasma heat by dissipative mechan
Externí odkaz:
http://arxiv.org/abs/1705.07046
Publikováno v:
Phys. Rev. Lett. 115, 025003, 2015
Nonlinear energy transfer and dissipation in Alfv\'en wave turbulence are analyzed in the first gyrokinetic simulation spanning all scales from the tail of the MHD range to the electron gyroradius scale. For typical solar wind parameters at 1 AU, abo
Externí odkaz:
http://arxiv.org/abs/1505.02204
Autor:
Howes, G. G.
A dynamical approach, rather than the usual statistical approach, is taken to explore the physical mechanisms underlying the nonlinear transfer of energy, the damping of the turbulent fluctuations, and the development of coherent structures in kineti
Externí odkaz:
http://arxiv.org/abs/1502.04109
The interpretation of single-point spacecraft measurements of solar wind turbulence is complicated by the fact that the measurements are made in a frame of reference in relative motion with respect to the turbulent plasma. The Taylor hypothesis---tha
Externí odkaz:
http://arxiv.org/abs/1405.5460
Results of the first validation of large guide field, $B_g / \delta B_0 \gg 1$, gyrokinetic simulations of magnetic reconnection at a fusion and solar corona relevant $\beta_i = 0.01$ and solar wind relevant $\beta_i = 1$ are presented, where $\delta
Externí odkaz:
http://arxiv.org/abs/1312.5166