Results 111 to 120 of about 9,642 (217)

Effects of Nonzero-frequency Fluctuations on Turbulence Spectral Observations

The Astrophysical Journal Letters
In situ observations of turbulence spectra in space plasmas are usually interpreted as wavenumber spectra, assuming that the fluctuation frequency is negligible in the plasma flow frame.
L.-L. Zhao, G. P. Zank, H. Li
doaj   +1 more source

The Density Distribution of Compressively Forced, Supersonic Turbulence Depends on the Driving Correlation Time

The Astrophysical Journal
Supersonic turbulence plays a critical role in shaping astrophysical systems, from molecular clouds to the circumgalactic medium. Key properties of this turbulence include the Mach number, driving scale, and nature of the driving mechanism, which can be ...
Philipp Grete, Evan Scannapieco, Marcus Brüggen, Liubin Pan   +3 more
doaj   +1 more source

Quiet-time electron increases, a measure of conditions in the outer solar system [PDF]

One possible explanation for quiet-time electron increases, increases in the intensity of 3-12 MeV interplanetary electrons that have been reported by McDonald, Cline and Simnett, is discussed.
Fisk, L. A., Vanhollebeke, M.
core   +1 more source

Two Pathways of Turbulent Energy Processing in Solar Wind Current Sheets: Confined Fragmentation versus Organized Transport

The Astrophysical Journal
Understanding how turbulent energy is dissipated in the heliosphere remains a central challenge in space plasma physics. While magnetic reconnection and other dissipative processes occurring within current sheets are widely regarded as leading channels ...
Y. Wang, L. D. Wang, F. S. Wei, X. S. Feng, W. Y. Zhang, B. Y. Wang, P. B. Zuo, X. J. Xu, Z. L. Zhou   +8 more
doaj   +1 more source

Solar cycle evolution of ICME sheath regions at 1 AU

Astronomy & Astrophysics
Aims. We investigate the evolution of interplanetary coronal mass ejection (ICME) sheath regions at 1 AU across solar cycles 23, 24, and the rising phase of 25, focusing on their variability and turbulence in relation to upstream solar wind conditions ...
Larrodera C., Temmer M., Owens M.
doaj   +1 more source

Evolution of Solar Wind Turbulence during Radial Alignment of Parker Solar Probe and Solar Orbiter in 2022 December

The Astrophysical Journal Supplement Series
We investigate the radial evolution of solar wind turbulence during the radial alignment of Parker Solar Probe (PSP) and Solar Orbiter (SO) on 2022 December 10, with PSP located at approximately 0.11 au and SO near 0.88 au.
Ashok Silwal, Lingling Zhao, Xingyu Zhu, Luca Sorriso-Valvo, Lina Z. Hadid, Gary P. Zank, Hui Li, Samuel T. Badman, Yeimy J. Rivera, Sujan Prasad Gautam, Monika Karki, Juan G Alonso Guzman, Nibuna S. M. Subashchandar, Zeping Jin   +13 more
doaj   +1 more source

Influence of Solar Cycle on Magnetohydrodynamic Turbulent Modes at 1 au

The Astrophysical Journal
We study the effect of the solar cycle on various magnetohydrodynamic (MHD) fluctuation modes using the linear mode decomposition technique developed by G. P. Zank et al.
Sujan Prasad Gautam, Gary P. Zank, Laxman Adhikari, Alexander Pitňa, Ashok Silwal   +4 more
doaj   +1 more source

An Improved Fit to the Density Fluctuations in Supersonic Isothermal Turbulence

The Astrophysical Journal
The density distribution of supersonic isothermal turbulence plays a critical role in many astrophysical systems. It is commonly approximated by a log-normal distribution with a variance of ${\sigma }_{s,{\rm{V}}}^{2}\approx \mathrm{ln}(1+{b}^{2}{M}_ ...
Evan Scannapieco, Marcus Brüggen, Philipp Grete, Liubin Pan   +3 more
doaj   +1 more source

Comparison of deep space and near-earth observations of plasma turbulence at solar wind discontinuities [PDF]

Simultaneous observations of plasma waves from the electric field instruments on Pioneer 9 and OGO 5 are used to illustrate the difference between near-earth and deep space conditions.
Fredricks, R. W., Green, I. M., Scarf, F. L.   +2 more
core   +1 more source

Turbulence-driven Anisotropic Acceleration of Energetic Electrons in Solar Wind Current Sheets

The Astrophysical Journal Letters
Coherent structures in the solar wind, such as current sheets, are widely recognized as potential sites for energy dissipation and particle acceleration.
L. D. Wang, Y. Wang, F. S. Wei, X. S. Feng, B. Y. Wang, P. B. Zuo, Y. L. Chen, X. J. Xu, Z. L. Zhou   +8 more
doaj   +1 more source