Results 1 to 10 of about 1,320 (193)

Evolution of the interplanetary magnetic field [PDF]

, 1994
Remote observations of magnetic field topologies in the solar corona and in situ observations of the solar wind and interplanetary magnetic field (IMF) in interplanetary space are used to examine the temporal evolution of the spatial distribution of open and closed field regions emanating from the Sun.
openaire   +1 more source

Effects of Waves on the Spectral Anisotropy of the Transition Range in Solar Wind Turbulence

The Astrophysical Journal
In the transition range of the solar wind turbulence, the magnetic spectrum has been observed to be strongly anisotropic with respect to the local mean field. However, the generation mechanism of the anisotropy remains not well understood.
Hua Zhang, Xin Wang, Haochen Yuan
doaj   +1 more source

Instabilities Driven by Proton Temperature Anisotropy in the Presence of Alpha Particles: Implications for Proton-temperature-anisotropy Constraint in the Solar Wind

The Astrophysical Journal, 2023
In situ measurements reveal that proton temperature anisotropy is ubiquitous in the solar wind. Various plasma instabilities have been proposed to regulate the distribution of the proton temperature anisotropy in the solar wind; detailed constraint ...
L. Xiang, D. J. Wu, L. Chen, Q. H. Li, G. Q. Zhao, H. Q. Feng, H. W. Yu   +6 more
doaj   +1 more source

Improved Energy Fractions for Model Slab and Two-dimensional Interplanetary Turbulence

The Astrophysical Journal Supplement Series
The distribution of energy within interplanetary turbulence has been modeled with a slab part with wavevectors along the background magnetic field B _0 and a 2D part with wavevectors perpendicular to B _0 . J. W. Bieber et al.
Bernard J. Vasquez, Charles W. Smith, Roy B. Torbert   +2 more
doaj   +1 more source

Synoptic Maps of Solar Magnetic Field and Open Magnetic Flux

The Astrophysical Journal
The interplanetary magnetic field (IMF) measured near Earth can be up to 2 times greater than that derived from models using remote solar observations.
Yang Liu, C. Nick Arge, Shaela I. Jones, Andrew Leisner, Ruizhu Chen, J. Todd Hoeksema   +5 more
doaj   +1 more source

The prediction of coronal and interplanetary magnetic fields [PDF]

Observation and Prediction of Solar Activity Conference, 1970
Solar coronal structure and interplanetary magnetic fields prediction based on magnetic models, testing accuracy at solar ...
openaire   +2 more sources

Spectral Anisotropy at Ion Scales in the Solar Wind Upstream of the Martian Bow Shock

The Astrophysical Journal
The spectral anisotropy of magnetic field fluctuations at ion scales in the solar wind upstream of the Martian bow shock remains poorly understood. In the solar wind near the Earth’s orbit, such anisotropy is known to be modulated by ion-scale waves ...
Hua Zhang, Xin Wang, Ruihui Yu, Binbin Tang   +3 more
doaj   +1 more source

A Complete Theory for Nondiffusive Field Line Random Walk in Magnetic Turbulence

The Astrophysical Journal
Previous analytical and numerical investigations of the stochastic properties of field lines in magnetic turbulence have been based on determining the running field-line diffusion coefficient.
A. Shalchi
doaj   +1 more source

The structure of helical interplanetary magnetic fields

Geophysical Research Letters, 1991
The interplanetary magnetic field is known to be highly helical. Although the detailed spatial structure of the fields has yet to be elucidated, the helicity spectrum has been conjectured to result from a random walk in direction of a constant magnitude magnetic field vector.
Goldstein, Melvyn, Roberts, D. A., Fitch, C. A.   +2 more
openaire   +1 more source

Hybrid Simulations of the Cusp and Dayside Magnetosheath Dynamics Under Quasi-Radial Interplanetary Magnetic Fields. [PDF]

J Geophys Res Space Phys, 2022
Ng J, Chen LJ, Omelchenko Y, Zou Y, Lavraud B.   +4 more
europepmc   +1 more source