Results 111 to 120 of about 1,247 (219)

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

Quiet time particle acceleration in interplanetary space

, 2005
We propose a model for the acceleration of charged particles in interplanetary space that appear during quiet time periods, that is, not associated with solar activity events like intense flares or coronal mass ejections.
L. Vlahos, K. Petraki, H. Isliker, F. Lepreti   +3 more
core   +1 more source

Evolution of the Interplanetary Turbulence and the Associated Turbulence Anisotropy in the Outer Heliosphere: VOYAGER 2 Observations

The Astrophysical Journal
Abstract We study the radial evolution of the inertial-range solar wind plasma turbulence and its anisotropy in the outer heliosphere. We use magnetic field ( B ) measurements from the Voyager 2 spacecraft for heliocentric distances R from 1 to 33 au.
Xingyu Zhu, Jiansen He, Gary P. Zank, Daniel Verscharen, Ling-Ling Zhao, Die Duan, Rong Lin   +6 more
openaire   +3 more sources

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

Local Proton Heating at Magnetic Discontinuities in Alfvénic and Non-Alfvénic Solar Wind

The Astrophysical Journal
We investigate the local proton energization at magnetic discontinuities/intermittent structures and the corresponding kinetic signatures in velocity phase space in Alfvénic (high cross helicity) and non-Alfvénic (low cross helicity) wind streams ...
C. A. González, J. L. Verniero, R. Bandyopadhyay, A. Tenerani   +3 more
doaj   +1 more source

A Closer Look at Small-scale Magnetic Flux Ropes in the Solar Wind at 1 au: Results from Improved Automated Detection

The Astrophysical Journal Supplement Series
Small-scale interplanetary magnetic flux ropes (SMFRs) are similar to ICMEs in magnetic structure, but are smaller and do not exhibit coronal mass ejection plasma signatures.
Hameedullah Farooki, Sung Jun Noh, Jeongwoo Lee, Haimin Wang, Hyomin Kim, Yasser Abduallah, Jason T. L. Wang, Yu Chen, Sergio Servidio, Francesco Pecora   +9 more
doaj   +1 more source

Velocity-space Turbulent Cascade in the Near-Sun Solar Wind: First Insights from the Parker Solar Probe Mission

The Astrophysical Journal Letters
In space plasmas, the rarity of collisions leads to complex structures in the velocity space where a turbulent cascade of the velocity distribution function (VDF) fluctuations is thought to occur.
A. Larosa, O. Pezzi, T. Bowen, L. Sorriso-Valvo, N. Sioulas, F. Pucci, D. Trotta, J. L. Verniero, R. Livi, S. Bharati Das, A. Chasapis, D. Perrone, F. Valentini, S. Servidio   +13 more
doaj   +1 more source

Small-scale solar wind density turbulence spectrum from interplanetary scintillation observations

, 2012
The method of determining the angular sizes of compact radio sources and parameters of the plasma turbulence using temporal scintillation power spectra is described and tested.
Chashei, I.V., Glubokova, S.K., Tyul'bashev, S.A.   +2 more
core  

Unveiling the Global Characteristics of Turbulence in the Venusian Space Environment

Geophysical Research Letters
Turbulence plays a crucial role in energy transfer from large to small scales in solar wind‐Venus interaction. Observations have identified magnetic field fluctuations and turbulence in the Venusian space environment. However, due to limited observations
Tong Dang, Jiuhou Lei, Binzheng Zhang, Sudong Xiao, Tielong Zhang, Jiansen He, Junjie Chen, Maodong Yan, Zhonghua Yao   +8 more
doaj   +1 more source