Results 51 to 60 of about 588 (209)
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
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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 +4 more
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Spherical Harmonic Representation of Energetic Neutral Atom Flux Components Observed by IBEX
The Astrophysical Journal Supplement Series, 2023 The Interstellar Boundary Explorer (IBEX) images the heliosphere by observing energetic neutral atoms (ENAs). The IBEX-Hi instrument on board IBEX provides full-sky maps of ENA fluxes produced in the heliosphere and very local interstellar medium through
P. Swaczyna +2 more
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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 +11 more
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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
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Flight Times to the Heliopause Using a Combination of Solar and Radioisotope Electric Propulsion [PDF]
, 2011 We investigate the interplanetary ight of a low-thrust space probe to the heliopause, located at a distance of about 200AU from the Sun. Our goal was to reach this distance within the 25 years postulated by ESA for such a mission (which is less ...
Dachwald, Bernd +3 more
core
Exploring the Complex Heliotail Boundary by an Extended Level Set Approach
The Astrophysical Journal LettersThere 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 +4 more
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A Heliopause Spectrum for Electrons
, 2013 We present a heliopause spectrum for galactic electrons over an energy range from 1 MeV to 50 GeV at 122 AU from the Sun. This spectrum can be considered the lowest possible local interstellar spectrum (LIS). This is obtained by using a comprehensive numerical model for solar modulation in comparison with Voyager 1 observations during 2010 and PAMELA ...
Potgieter, M. S. +3 more
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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 +2 more
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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 +3 more
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