Results 101 to 110 of about 78,655 (291)

Observations of the Magnetopause Reconnection Ion Diffusion Region With High‐Density O+ Ions During the May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Based on high‐resolution measurements from NASA's Magnetospheric Multiscale mission (MMS), we present the first direct observation of an ion diffusion region (IDR) with high number density O+ ions within dayside magnetopause reconnection during the May 2024 superstorm. The O+ ion density reaches a high value of ∼3.3 cm−3.
Anxin Zhang, Suping Duan, Lei Dai, Yuntian Hou, Yong Ren, Chi Wang, S. A. Fuselier, C. Philippe Escoubet, James L. Burch   +8 more
wiley   +1 more source

First Quantitative Results on the Response of Green and Red Line Dayglow Emissions to Solar Flares of Different Magnitudes

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Flares originate from the impulsive release of magnetic energy in the solar atmosphere. The rise in X‐ray flux enhances ionization/electron content in the upper atmosphere, modifying the photochemical and dynamical processes that govern the ionosphere‐thermosphere behavior.
Komal, Duggirala Pallamraju
wiley   +1 more source

Fundamental Physics and Relativistic Laboratory Astrophysics with Extreme Power Lasers

, 2012
The prospects of using extreme relativistic laser-matter interactions for laboratory astrophysics are discussed. Laser-driven process simulation of matter dynamics at ultra-high energy density is proposed for the studies of astrophysical compact objects ...
Bulanov, S. V., Esirkepov, T. Zh.
core   +1 more source

Sudden Ionospheric Disturbances Generated by Solar Flares—Not so Sudden?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract It is known that solar flares generate instantaneous ionization enhancement, referred to as sudden ionospheric disturbance (SID), that occurs simultaneously across the entire dayside. In this work, we use high‐rate 1‐s data of total electron content (TEC) to analyse ionospheric response to 13 solar flares that occurred in 2003–2023.
B. Maletckii, E. Astafyeva, N. M. Pedatella, L. Qian   +3 more
wiley   +1 more source

Free–Free Gaunt Factors for Atmospheres of Accreting Pulsars Observable with X-Ray Space Missions

The Astrophysical Journal
Free–free Gaunt factors for X-ray absorption by hot plasma in the presence of a strong magnetic field are reported. Modified formulae are used for application to the nonlocal thermodynamic equilibrium conditions found in accreting pulsar atmospheres ...
Parisee S. Shirke
doaj   +1 more source

Galaxy rotation curves: the effect of j x B force

, 2011
Using the Galaxy as an example, we study the effect of j x B force on the rotational curves of gas and plasma in galaxies. Acceptable model for the galactic magnetic field and plausible physical parameters are used to fit the flat rotational curve for ...
A.H. Nelson, C. Quireza, C.L. Dobbs, C.L. Eck Van, D. Tsiklauri, E. Battaner, E. Battaner, E. Battaner, E. Battaner, F.J. Sanchez-Salcedo, G. Gilmore, J. Alvarez-Muniz, J.I. Katz, J.L. Han, J.P. Vallée, J.P. Vallée, J.R. Brownstein, J.T. Gosling, J.W. Moffat, M. Milgrom, M.V. Medvedev, T. Stanev, X.H. Sun, Y. Sofue   +23 more
core   +1 more source

Observations and Simulation of Thermospheric Composition Changes During the 14 October 2023 Solar Eclipse

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract This study presents a full‐period imaging of the thermospheric composition response to the 14 October 2023 annular solar eclipse, combining GOLD (Global‐scale Observations of the Limb and Disk) far‐ultraviolet observations with solar‐irradiance‐driven WACCM‐X (Whole Atmosphere Community Climate Model with thermosphere–ionosphere extension ...
Yu Jiao, Jing Liu, Xuguang Cai, Joseph M. McInerney, Shuhan Li   +4 more
wiley   +1 more source

Whistler–Alfvén Turbulence in a Nonneutral Ultrarelativistic Pair Plasma

The Astrophysical Journal
The large-scale dynamics of most conventional space and astrophysical plasmas are predominantly governed by Alfvén modes, which are low-frequency magnetohydrodynamic modes existing in magnetized media.
Stanislav Boldyrev, Mikhail Medvedev
doaj   +1 more source

Ultra-high charge electron acceleration for nuclear applications

Fundamental Plasma Physics
Ultra-intense laser-plasma wakefield accelerator possess several superior properties compared with the traditional radio-frequency accelerators. These characteristics include femtosecond duration, micro-source size, and ultra-dense beam density, result ...
Liming Chen, Jie Feng, Wenchao Yan, Hao Xu, Yaojun Li, Wenzhao Wang, Xulei Ge, Xiaojun Huang, Jie Zhang   +8 more
doaj   +1 more source

Thermalization of a nonequilibrium electron-positron-photon plasma

, 2007
Starting from a nonequilibrium configuration we analyse the essential role of the direct and the inverse binary and triple interactions in reaching an asymptotic thermal equilibrium in a homogeneous isotropic electron-positron-photon plasma.
A. G. Aksenov, A. I. Akhiezer, D. Mihalas, E. M. Lifshitz, E. W. Kolb, G. Hall, G. V. Vereshchagin, G. S. Bisnovatyi-Kogan, J. Ehlers, P. S. Coppi, P. W. Guilbert, R. Ruffini, R. Ruffini, R. Ruffini, R. Svensson, S. Stepney, S. T. Belyaev, S. T. Belyaev, W. Greiner   +18 more
core   +1 more source