Results 51 to 60 of about 2,085 (203)

Predictions for the Shape and Orientation of Earth's Foreshock Radiation Sources

Journal of Geophysical Research: Space Physics, Volume 130, Issue 7, July 2025.
Abstract Radio emission produced in Earth's foreshock is due to the bow shock reflecting some electrons back upstream into the foreshock, where they produce Langmuir waves and radio emissions near the electron plasma frequency fp ${f}_{p}$ and near 2fp $2{f}_{p}$.
Iver H. Cairns, Patrick Oppel
wiley   +1 more source

Dynamics and Control of a Flexible Solar Sail

Mathematical Problems in Engineering, Volume 2014, Issue 1, 2014., 2014
Solar sail can merely make use of solar radiation pressure (SRP) force as the thrust for space missions. The attitude dynamics is obtained for the highly flexible solar sail with control vanes, sliding masses, and a gimbaled control boom. The vibration equations are derived considering the geometric nonlinearity of the sail structure subjected to the ...
Jiafu Liu, Siyuan Rong, Fan Shen, Naigang Cui, Sebastian Anita   +4 more
wiley   +1 more source

A predicted small and round heliosphere [PDF]

, 2018
The shape of the solar wind bubble within the interstellar medium, the so-called heliosphere, has been explored over six decades(1-7). As the Sun moves through the surrounding partially-ionized medium, neutral hydrogen atoms penetrate the heliosphere ...
Drake, James, Loeb, Abraham, Opher, Merav, Toth, Gabor   +3 more
core   +2 more sources

Giant Undulations Driven by Pitch‐Angle Scattering of Time Domain Structures Modulated by Plasmapause Surface Wave

Geophysical Research Letters, Volume 52, Issue 3, 16 February 2025.
Abstract Plasmapause surface waves (PSWs) near the plasmapause boundary are regarded to be the magnetospheric source of ionospheric auroral giant undulations (GUs) located at the equatorward boundary of diffuse aurora. However, the observational evidence of wave‐particle interaction connecting PSWs and GUs is absent.
Yi‐Jia Zhou, Pei‐Heng Du, Jian Liu, Quan‐Qi Shi, Meng‐Dan Guo, Fei He, Xiao‐Xin Zhang, Yong‐Liang Zhang, Zhong‐Hua Yao, Jun Zhong, Zhaojin Rong, Yong Wei   +11 more
wiley   +1 more source

Existence and Stability for the 3D Linearized Constant‐Coefficient Incompressible Current‐Vortex Sheets

International Journal of Differential Equations, Volume 2013, Issue 1, 2013., 2013
We consider the free boundary problem for current‐vortex sheets in ideal incompressible magnetohydrodynamics. The problem of current‐vortex sheets arises naturally, for instance, in geophysics and astrophysics. We prove the existence of a unique solution to the constant‐coefficient linearized problem and an a priori estimate with no loss of derivatives.
Davide Catania, Helge Holden
wiley   +1 more source

Modeling of Heliospheric Modulation of Cosmic-ray Positrons in a Very Quiet Heliosphere [PDF]

, 2018
Heliospheric modulation conditions were unusually quite during the last solar minimum activity between Solar Cycles 23/24. Fortunately, the PAMELA space-experiment measured six-month averaged Galactic positron spectra for the period July 2006 to December
Aslam, O. P. M., Bisschoff, D., Boezio, M., Munini, R., Potgieter, M. S.   +4 more
core   +3 more sources

Exploring the Complex Heliotail Boundary by an Extended Level Set Approach

The Astrophysical Journal Letters
There is an ongoing debate regarding the shape of the heliotail. Studies have shown that the heliotail may be “comet-like,” extending for thousands of au. Some previous works defined the heliopause using magnetohydrodynamic variables, which only serve as
C. Onubogu, M. Opher, M. Kornbleuth, G. Tóth, V. Florinski   +4 more
doaj   +1 more source

Pickup Ions beyond the Heliopause

The Astrophysical Journal, 2019
Abstract Fluxes of energetic neutral atoms (ENAs) with energies greater than 1 KeV measured by the Interstellar Boundary Explorer (IBEX) are predominantly created by charge exchange of interstellar neutral atoms with hot, nonthermal (pickup) ions. Since the properties of pickup ions (PUIs) depend on the place of their birth, they bear an
V. Roytershteyn, N. V. Pogorelov, J. Heerikhuisen   +2 more
openaire   +1 more source

Kinetic Theory of Drift‐Mirror Mode

Geophysical Research Letters, Volume 51, Issue 18, 28 September 2024.
Abstract We present a nonlocal gyrokinetic theory for the drift‐mirror mode in high‐β $\beta $ anisotropic plasmas. Here, β $\beta $ represents the ratio of plasma pressure to magnetic pressure. The equilibrium distribution is established self‐consistently via guiding‐center Hamiltonian theory.
Yao Yao, Haotian Chen, Zilong Li, Jiquan Li   +3 more
wiley   +1 more source

Toward more realistic analytic models of the heliotail: Incorporating magnetic flattening via distortion flows

, 2015
Both physical arguments and simulations of the global heliosphere indicate that the tailward heliopause is flattened considerably in the direction perpendicular to both the incoming flow and the large-scale interstellar magnetic field. Despite this fact,
Fichtner, Horst, Heerikhuisen, Jacob, Kleimann, Jens, Röken, Christian   +3 more
core   +1 more source