Results 101 to 110 of about 2,470 (245)

Plasma mixing driven by the collisionless Kelvin–Helmholtz instability

Astronomy & Astrophysics
Context. Simulations and observations of the low-latitude magnetosphere–magnetosheath boundary layer indicate that the Kelvin–Helmholtz instability (KHI) drives vortex structures that enhance plasma mixing and magnetic reconnection, thereby influencing ...
Ferro Silvia, Bacchini Fabio, Arrò Giuseppe, Pucci Francesco, Henri Pierre   +4 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 Theory of Resonant Cosmic Ray–driven Instabilities—Growth and Saturation of Single Modes

The Astrophysical Journal
Cosmic-ray (CR) feedback is critical for galaxy formation as CRs drive galactic winds, regularize star formation in galaxies, and escape from active galactic nuclei to heat the cooling cores of galaxy clusters.
Rouven Lemmerz, Mohamad Shalaby, Christoph Pfrommer, Timon Thomas   +3 more
doaj   +1 more source

New Observations of Cosmic Noise Absorption in the South American Magnetic Anomaly (SAMA) Using a Next‐Generation Riometer

Space Weather, Volume 24, Issue 7, July 2026.
Abstract This study reports the first observations of cosmic noise power (CNP) and cosmic noise absorption (CNA) obtained with a next‐generation riometer installed at the Southern Space Observatory (SSO/INPE) in Brazil, located within the South American Magnetic Anomaly (SAMA).
J. Moro, E. Correia, C. M. Wrasse, J. R. Costa, J. V. Bageston, C. M. Denardini, A. J. Valcorte, L. C. A. Resende, A. M. Santos, L. A. da Silva, J. P. Marchezi, T. S. Trondsen   +11 more
wiley   +1 more source

Conditions for Relativistic Magnetic Reconnection under the Presence of Shear Flow and Guide Field

The Astrophysical Journal
The scaling of the relativistic reconnection outflow speed is studied in the presence of both shear flows parallel to the reconnecting magnetic fields and guide fields pointing out of the reconnection plane.
Sarah Peery, Yi-Hsin Liu, Xiaocan Li
doaj   +1 more source

Introduction to TREx‐ATM V2.0: A Versatile Model of Auroral Transport and Its Effects in the Ionosphere

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Auroral transport models (ATMs) play an important role in quantitative studies of optical auroras, their driving mechanisms, and their effects on the ionosphere and thermosphere. TREx‐ATM was initially developed as the support model for the Transition Region Explorer (TREx) mission, and has gained increasing applications in the community in ...
Jun Liang, E. Donovan, E. Spanswick, C. Gabrielse, D. Chaddock, J. Houghton   +5 more
wiley   +1 more source

Relativistic Alfvén Turbulence at Kinetic Scales

The Astrophysical Journal
In a strongly magnetized, magnetically dominated relativistic plasma, Alfvénic turbulence can extend to scales much smaller than the particle inertial scales.
Cristian Vega, Stanislav Boldyrev, Vadim Roytershteyn   +2 more
doaj   +1 more source

Groundwater Connectivity and Buffering in Western Australian Hypersaline Lakes: Implications for Late‐Stage Martian Lacustrine Systems

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Thousands of saline to hypersaline lakes exist across the Yilgarn Craton in Western Australia, representing potential Mars analogs with diverse and varying salinity, pH, and oxygen conditions that remain poorly constrained. Here, we report geochemical trends in lake waters that vary across wet‐dry cycles as well as with regional location and ...
T. A. Plattner, B. E. Schmidt, N. M. Fernandez, P. T. Doran, M. A. Birmingham, J. M. Weber, A. Celestian, E. D. Ingall, J. S. Bowman, S. M. Som, A. Odenheimer, T. Bornholdt, C. Sephus, H. T. Jamison, K. Russo, S. Buessecker, L. A. Fisher, B. Klempay, E. R. Paris, E. J. Skoog, M. M. Weng, C. Pozarycki, A. T. Schartup, C. E. Carr, J. J. Wray, F. Rivera‐Hernández, E. Quartini   +26 more
wiley   +1 more source

New MAVEN NGIMS Mars Thermosphere Temperature Database for Short Term Variability and Long Term Trends

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Current Mars thermospheric temperatures databases have course temporal resolution due to either a lack of data or a need to average over several orbits of data, preventing the study of short‐term, rapid changes to the Mars thermosphere. In this study, we present a new Mars thermosphere temperature database derived from individual orbits of ...
N. B. Pickett, M. Felici, N. Jones, D. Pawlowski, P. Withers, M. Benna, S. Curry   +6 more
wiley   +1 more source

Occurrence and Provenance of KREEP Components in Glassy Agglutinates From Chang'e‐5 Lunar Regolith

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract This study investigates the petrogenesis of glassy agglutinates in a polished section of the Chang'e‐5 lunar regolith sample CE5C0800YJYX018GP through integrated petrographic, mineralogical, and geochemical analyses of four representative particles (18GP‐01 to 18GP‐04).
Shuai Ma, Zhipeng Xia, Bingkui Miao
wiley   +1 more source