Results 71 to 80 of about 2,583 (231)

Turbulent Diffusion of Magnetic Field Lines in the Heliosphere

The Astrophysical Journal
Due to solar wind turbulence, Parker spirals are stochastic. The dispersion of magnetic field lines is described by a convection–diffusion equation for the field line density distribution, which is a function of the two heliographic angles in addition to
J. V. A. Joubert, R. D. Strauss, J. Light, N. E. Engelbrecht, N. H. Bian   +4 more
doaj   +1 more source

Impact of Magnetosphere Forcing and Model Resolution on Joule Heating Estimates in WACCM‐X During the 24 August 2005 Storm

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract We investigate the high‐latitude Joule heating in a recently developed high‐resolution configuration of the WACCM‐X whole‐atmosphere model coupled to the MAGE model. Model resolution and geomagnetic forcing effects during the severe (Kp>8) $(Kp > 8)$ geomagnetic storm on 24 August 2005 are analyzed, distinguishing storm peak and recovery ...
Florian Günzkofer, Hanli Liu, Kevin Pham, Huixin Liu, Gunter Stober, Joseph M. McInerney, David R. Themens, Claudia Borries   +7 more
wiley   +1 more source

Solar wind-magnetosphere-ionosphere interactions in the earth's plasma environment [PDF]

, 2003
The properties of the Earth’s coupled magnetosphere-ionosphere system are dominated by its interaction with the solar wind plasma, mediated by magnetic reconnection processes at the magnetopause interface.
McWilliams, K. A., Davies, J. A., Sandholt, P. E., Cowley, S. W. H., Milan, S. E., Provan, G., Lester, M., Wild, J. A., Khan, H., Yeoman, T. K., Grocott, A.   +10 more
core  

Effects of M dwarf magnetic fields on potentially habitable planets [PDF]

, 2013
A.A.V. acknowledges support from the Royal Astronomical Society through a post-doctoral fellowship. J.M. acknowledges support from a fellowship of the Alexander von Humboldt foundation. P.L. acknowledges funding from a STFC scholarship.
Morin, J., J.-F. Donati, Russell, A.J.B., P. Lang, Donati, J. -F., Jardine, M., A. A. Vidotto, M. Jardine, Morin, Julien, Donati, J.-F., Lang, P., Vidotto, A. A., Russell, A. J. B., Donati, J., Vidotto, A., A. J. B. Russell, J. Morin, Vidotto, A.A., Russell, A., J. -f. Donati   +19 more
core   +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

On the Origin of High–Frequency Magnetic Fluctuations in the Interplanetary Medium: A Brownian–like Approach

Frontiers in Physics, 2021
Low–frequency fluctuations in the interplanetary medium have been extensively investigated and described in the framework of turbulence, and the observed universal scaling behavior represents a clear signature of the underlying energy cascade.
Vincenzo Carbone, Vincenzo Carbone, Fabio Lepreti, Fabio Lepreti, Antonio Vecchio, Antonio Vecchio, Tommaso Alberti, Federica Chiappetta   +7 more
doaj   +1 more source

Soft Proton Environment Modeling for SMILE Using XGBoost and Solar Cycle–Informed Synthetic Data Sets

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Soft proton contamination presents a persistent threat to the performance of space‐based X‐ray observatories such as ESA's upcoming Solar‐wind Magnetosphere Ionosphere Link Explorer (SMILE). This study develops a machine‐learning framework for modeling soft proton fluxes in the 92.2–159.7 keV range, tailored to SMILE's elliptical, highly ...
Simon Mischel, Elena A. Kronberg, C. P. Escoubet   +2 more
wiley   +1 more source

The influence of a mean magnetic field on three-dimensional magnetohydrodynamic turbulence

, 1994
Building on results from two-dimensional magnetohydrodynamic (MHD) turbulence (Shebalin, Matthaeus & Montgomery 1983), the development of anisotropic states from initially isotropic ones is investigated numerically for fully three-dimensional ...
Priest, Eric R., Matthaeus, William H., Oughton, Sean   +2 more
core   +1 more source

Proposed Resolution to the Solar Open Magnetic Flux Problem

The Astrophysical Journal
The solar magnetic fields emerging from the photosphere into the chromosphere and corona are comprised of a combination of closed (field lines with both ends rooted at the Sun) and open (field lines with only one end at the Sun) fields.
C. Nick Arge, Andrew Leisner, Spiro K. Antiochos, Samantha Wallace, Carl J. Henney   +4 more
doaj   +1 more source

Low-frequency Waves Due to Newborn Interstellar Pickup Ions Observed from 43 to 47 au by the Voyager 1 Spacecraft

The Astrophysical Journal, 2023
Interstellar neutral atoms enter the heliosphere at a relatively slow speed corresponding to the motion of the Sun through the local interstellar medium, which is approximately 25 km s ^−1 .
Lily A. Ercoline, Charles W. Smith, Matthew R. Argall, Colin J. Joyce, Philip A. Isenberg, Bernard J. Vasquez, Nathan A. Schwadron, Justyna M. Sokół, Leonard F. Burlaga   +8 more
doaj   +1 more source