Results 101 to 110 of about 88,907 (241)

Linear astrophysical dynamos in rotating spheres Differential rotation, anisotropic turbulent magnetic diffusivity, and solar-stellar cycle magnetic parity

The Astrophysical Journal, 1984
H. Yoshimura, Z. Wang, F. Wu
openaire   +1 more source

Including Atmospheric Backscatter Effects in Modeling of EMIC Wave‐Driven Precipitation

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract Pitch‐angle diffusion is a key mechanism driving radiation belt electron loss into the atmosphere. However, traditional bounce‐averaged models, which assume complete atmospheric absorption for loss cone electrons, cannot accurately quantify the loss cone fluxes.
Zhi‐Gu Li, Weichao Tu, Richard Selesnick, Luisa Capannolo, Grant Berland, Qianli Ma   +5 more
wiley   +1 more source

Linear Astrophysical Dynamos in Rotating Spheres - Solar and Stellar Cycle North-South Hemispheric Parity Selection Mechanism and Turbulent Magnetic Diffusivity

The Astrophysical Journal, 1984
H. Yoshimura, F. Wu, Z. Z. Wang
openaire   +1 more source

Phenomenological Evaluation of the Electron Density‐Based Péclet Number of Near‐Earth Solar Wind Turbulence

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract The electron density‐based Péclet number has been measured for the first time in the solar wind, alongside a measure of the magnetic Reynolds number. The Péclet number is an important characteristic of energy and particle transport. High Péclet numbers indicate that particle advection dominates diffusion of energy.
T. J. E. Hand, O. W. Roberts, X. Li, Y. Narita, Z. Vörös   +4 more
wiley   +1 more source

Timescales of Asymmetries in Magnetospheric Dynamics Induced by the IMF By Component

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract Recent studies have shown that global geomagnetic activity and particle precipitation are enhanced, when the dawn‐dusk By $\left({B}_{y}\right)$ component of the interplanetary magnetic field (IMF) and Earth's magnetic dipole tilt angle Ψ ${\Psi }$ have opposite signs.
J. Laitinen, L. Holappa, H. Vanhamäki, S. E. Milan   +3 more
wiley   +1 more source

Dynamic Test Particle Simulations of X‐Ray Emissions at Dayside Magnetopause Under Time‐Varying Solar Wind Conditions

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract The Latmos Test Particle (LaTeP) model is a steady‐state test particle code to investigate the solar wind charge exchange soft X‐ray emissions of the steady‐state Earth magnetosphere. In this study, we present the development of a new dynamic version (D‐LaTeP) extending the LaTeP model to adapt to time‐varying solar wind conditions.
Qiuyu Xu, Dimitra Koutroumpa, Ronan Modolo, Binbin Tang   +3 more
wiley   +1 more source

Stormtime Magnetospheric Processes Associated With the Dawnside Current Wedge

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract The intensification of the westward auroral electrojet (AEJ) in the dawn sector is a characteristic feature of the storm main phase. It is considered an ionospheric segment of a wedge‐type current system, the dawnside current wedge (DCW), formed by the disruption (short‐circuiting through the ionosphere) of a magnetospheric equatorial current.
S. Ohtani, S. Raptis, A. P. Devanandan, T. Motoba, Y. Zou, J. W. Gjerloev, V. G. Merkin   +6 more
wiley   +1 more source

Are Cusp‐Aligned Arcs the Equivalent of Auroral Streamers in a Closed Magnetosphere?

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract We present the first observations of a 3‐hour quasi‐periodic intensification of the polar auroras during a prolonged interval of strongly‐northward interplanetary magnetic field (IMF). This takes the form of a localized spot of auroral emission that appears near the pole which subsequently spreads sunward and antisunward to produce a sun ...
S. E. Milan, M. K. Mooney, G. E. Bower, G. Kennedy, X.‐Y. Wang, B. Hubert, M. R. Hairston, L. J. Paxton   +7 more
wiley   +1 more source

Properties of Earthward and Tailward High‐Speed Plasma Flows in Earth's Distant Magnetotail: Solar Cycle and Geomagnetic Activity Dependence

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract High‐speed plasma flows in Earth's magnetotail are important for the global dynamics of the magnetosphere. We survey 11 yrs of high‐speed plasma flows observed by the ARTEMIS spacecraft in Earth's distant magnetotail between XGSE = −52 RE and XGSE = −66 RE to investigate their properties for a wide range of solar and geomagnetic activity ...
Anissa Pokorny‐Yadav, Marit Øieroset, Tai D. Phan, Andrei Runov, Vassilis Angelopoulos   +4 more
wiley   +1 more source

Spontaneous Hot Flow Anomalies in Earth's Foreshock

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract In recent years, we have learned that foreshock transients play an influential role in solar wind coupling with Earth's magnetosphere. These transients include spontaneous hot flow anomalies (SHFAs), which are characterized by dips in magnetic field magnitude and ion density, enhanced temperature, decelerated and deflected solar wind flow, and
D. Rojas‐Castillo, X. Blanco‐Cano, P. Kajdič   +2 more
wiley   +1 more source