Results 81 to 90 of about 740 (225)

Modeling the shadow and ring structures of rotating Hayward black holes under magnetic charge and accretion influences

European Physical Journal C: Particles and Fields
Building upon our previous work, this study extends the analysis to the rotating case and systematically examines the combined effects of magnetic charge, spin, and accretion flow structure on the resulting shadow and photon ring features.
Sen Guo, En-Wei Liang, Wen-Hao Deng, Qing-Quan Jiang, Yu Liang, Kai Lin, Li-Fang Li   +6 more
doaj   +1 more source

Interplanetary Electric Fields for Extreme Magnetic Storms

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Using a list of sudden‐commencement storms, the ring‐current index, and 1‐h near‐Earth solar‐wind measurements from solar cycles 20–25, we develop extreme‐value statistical models relating storm intensity D=max{−Dst} $D=\max \left\{-Dst\right\}$ to the storm main‐phase maximum duskward interplanetary electric field E $E$.
Jeffrey J. Love, E. Joshua Rigler, Ian G. Richardson, Kalevi Mursula   +3 more
wiley   +1 more source

Listening, in Times of Noise

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Li Li
wiley   +1 more source

Simultaneous TRACERS and THEMIS Observations of Reversed Cusp Ion Dispersions and Dual‐Lobe Reconnection

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract We present observations from two consecutive TRACERS‐2 orbits through the northern low‐altitude cusp. During the first crossing, TRACERS‐2 observed reversed cusp ion dispersion and sunward convection, consistent with magnetopause reconnection tailward of the cusp during this northward IMF interval.
M. Øieroset, S. A. Fuselier, J. B. Bonnell, R. A. Roglans, J. S. Halekas, R. J. Strangeway, T. D. Phan, R. G. Gomez, S. M. Petrinec, K. J. Trattner, S. R. Shaver, K. A. Goodrich, S. A. Henderson, S. L. Soni, V. Angelopoulos, B. L. Burkholder, H. Cao, L.‐J. Chen, H. K. Connor, D. M. Miles, A. Moore, J. Ng, Y. Shen   +22 more
wiley   +1 more source

GRB 241030A: A bright afterglow challenging forward shock emission

Astronomy & Astrophysics
Context. Gamma-ray burst GRB 241030A (z = 1.411) exhibited a particularly bright afterglow (similar to the ‘BOAT’, GRB 221009A), detected across gamma-ray, X-ray, UV, and optical bands.
Ducoin J.-G., Pellouin C., Aivazyan V., Akl D., Alvarez F., Andrade C., Angulo C., Antier S., Atteia J.-L., Basa S., Becerra R. L., Benkhaldoun Z., Bissaldi E., Breeveld A., de Bruin E., Burns E., Butler N. R., Coughlin M. W., Daigne F., Dietrich T., Dornic D., Douzet C., du Laz T., Duverne P.-A., Eggenstein H. B., Elhosseiny E., Esamdin A., Evans P. A., Agüí Fernández J. F., Ferro M., Fortin F., Freeberg M., García-García L., Gill R., Globus N., Guessoum N., Hamed G. M., Hello P., Holzmann Airasca A., Hu D. F., Hussenot-Desenonges T., Inasaridze R., Iskandar A., Jiang S. Q., Jin C. C., Kaeouach A., Karpov S., Klingler N. J., Klotz A., Kochiashvili N., Koehn H., Kneip R., Kvernadze T., Le Calloch A., Lee W. H., Lekic A., Liang Y. F., Limonta C., Liu J., López K. Ocelotl. C., López-Cámara D., Mabrouk R. H., Magnani F., Mao J., Mašek M., Moreno Méndez E., Mihov B. M., Molham M., Noysena K., Odeh M., Omodei N., Peng H., Pereyra M., Pillas M., Pillera R., Pradier T., Rajabov Y., Rakotondrainibe N. A., Schneider B., Serrau M., Slavcheva-Mihova L., Sokoliuk O., Sun H., Takey A., Tanasan M., Tinyanont K. S., Turpin D., de Ugarte Postigo A., Wang B. T., Wang L. T., Wang X. F., Wang Z. M., Watson A. M., Wu H. Z., Wu Q. Y., Xu J. J., Yan Y. S., Yang H. N., Yuan W., Zhao H. S.   +99 more
doaj   +1 more source

UBVRI night sky brightness at Kottamia Astronomical Observatory. [PDF]

Sci Rep, 2023
Aboushelib MF, Morcos AB, Nawar S, Shalabiea OM, Awad Z.   +4 more
europepmc   +1 more source

Unraveling the Fine‐Scale Tapestry of Solar Wind at 1AU

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Solar wind is a complex network of distinct magnetic flux tubes, each contained and separated by a current sheet. In this study, more than 50,000 current sheets in the solar wind are identified and characterized for the first time, using multi‐point Cluster observations during solar minimum and maximum intervals.
M. Akhavan‐Tafti, S. Kumar, A. Szabo, B. Grison   +3 more
wiley   +1 more source

Multiple Extreme-ultraviolet Peaks Attributed to Three-dimensional Magnetic Reconnection in a Long-duration Solar Flare

The Astrophysical Journal
Solar flares are a major driver of hazardous space weather, whose intense electromagnetic emissions and energetic particles can significantly disturb the near-Earth space environment.
Shihan Li, Jinhan Guo, Wensi Wang, Yu Dai, Brigitte Schmieder, Jaroslav Dudík, Yang Guo, Mingde Ding   +7 more
doaj   +1 more source

MMS Observations of the Energetic Particles Within Kelvin‐Helmholtz Waves at the Boundary of the 10 May 2024 Coronal Mass Ejection (CME)

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract On 10 May 2024, Earth was hit by a CME that drove the largest geomagnetic storm in 20 years. Multi‐spacecraft observations previously showed that the ∼100 nT north‐south IMF bz ${b}_{z}$ variation was driven by Kelvin‐Helmholtz waves with wavelength ∼250 RE ${R}_{E}$ and reconnection jets in the ±z $\pm z$‐direction (Nykyri, 2024a, https://doi.
Katariina Nykyri, Neetasha Arya, Scott Boardsen, Guan Le, Harri Laakso, Lynn Wilson, Xuanye Ma, Katherine Holland, Brandon Burkholder, Leon Ofman, Kyoung‐Joo Hwang, Dinesh Radhakrishnan, Shiva Kavosi, Daniel Gershman, Christine Gabrielse, Barbara Giles, Stephen Fuselier, Jim Burch   +17 more
wiley   +1 more source

Nature‐Inspired Meta‐Heuristic Optimization Algorithms Integrated With Ensemble Machine Learning Techniques for Particulate Matter 2.5 Modeling

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Particulate Matter 2.5 is a major air pollutant that can deeply penetrate the respiratory system and enter the bloodstream when inhaled. The current study employs the use of both Nature inspired Meta‐heuristic optimization algorithms and Ensemble Machine learning techniques for the estimation of Particulate Matter 2.5 value using Sulfur ...
Abdullahi G. Usman, Sagiru Mati, Jamilu Usman, Saidur R. Chowdhury, Syed Masiur Rahman, Saad Sh. Sammen, Sani I. Abba, Ali Salem   +7 more
wiley   +1 more source