Results 71 to 80 of about 36,797 (212)
On the Electromagnetic Energy Flow Along Geodesics
Radio Science, Volume 61, Issue 1, January 2026.Abstract We present a field‐theoretic framework for modeling electromagnetic energy propagation in heterogeneous media by introducing the concept of electromagnetic geodesics. Unlike traditional ray optics, which assumes either a straight‐line propagation or a simple bending in refractive media, our approach formulates wave propagation as geodetic ...
Jacob T. Fokkema, Peter M. van den Berg
wiley +1 more source
Imprints of the Local Bubble and Dust Complexity on Polarized Dust Emission
The Astrophysical JournalUsing 3D dust maps and Planck polarized dust emission data, we investigate the influence of the 3D geometry of the nearby interstellar medium (ISM) on the statistics of the dust polarization on large ( $80^{\prime} $ ) scales.
George Halal +2 more
doaj +1 more source
Forecasting SEP Atmospheric and Space Radiation by Coupling UMASEP and NAIRAS Models
Space Weather, Volume 24, Issue 1, January 2026.Abstract The Nowcast of Aerospace Ionizing RAdiation System (NAIRAS) model predicts the radiation environment from the Earth's surface to free‐space. The model output provides dosimetric and particle flux quantities required to assess the hazardous radiation impacts to human health and adverse effects on vehicle electronic systems.
Christopher J. Mertens +4 more
wiley +1 more source
Magnetic Fields in the Southern Coalsack and Beyond
The Astronomical JournalStarlight polarimetry, when combined with accurate distance measurements, allows for exploration of the three-dimensional structure of local magnetic fields in great detail.
M. J. F. Versteeg +6 more
doaj +1 more source
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
wiley +1 more source
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 +3 more
wiley +1 more source
Evidence of Gradients of Density and Magnetic Field in the Remnant of Tycho’s Supernova
The Astrophysical JournalBy using surface brightness maps of Tycho’s supernova remnant (SNR) in radio and X-rays, along with the properties of thermal and synchrotron emission, we have derived the postshock density and magnetic field (MF) strength distributions over the ...
Oleh Petruk +7 more
doaj +1 more source
Concerning the origin of the magnetic fields on stars and in interstellar space [PDF]
Origin of magnetic fields on stars and in interstellar ...
Biermann, L.
core +1 more source
New Regime of MHD Turbulence: Cascade Below Viscous Cutoff
, 2002 In astrophysical situations, e.g. in the interstellar medium (ISM), neutrals can provide viscous damping on scales much larger than the magnetic diffusion scale.
Alex Lazarian +3 more
core +1 more source
Approximation of Daily AMS‐02 Spectra With Machine Learning Methods
Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 4, December 2025.Abstract Almost three thousand daily AMS‐02 proton spectra from 2011 to 2019 offer the most precise and extensive data set of cosmic ray spectra covering a wide energy range. As such, they offer a unique opportunity to test machine learning algorithms for approximating cosmic ray proton spectra based on the inputs usually available to solar modulation ...
Martin Nguyen, Pavol Bobík, Ján Genči
wiley +1 more source