Results 111 to 120 of about 17,719 (230)

Hard X-Ray Emission in AU Mic Flares: A Minor Contributor to Planetary Atmospheric Escape

The Astrophysical Journal
Stellar flares are potent drivers of atmospheric evolution on orbiting exoplanets, primarily through extreme ultraviolet (EUV) and soft X-ray irradiation.
Yifan Hu, Murray Brightman, Fabio Favata, Haiwu Pan, Brian Grefenstette, Fiona A. Harrison, Daniel Stern, Weimin Yuan, Yuk L. Yung, Xiurui Zhao   +9 more
doaj   +1 more source

Gamma-Ray Burst Timing: Decoding the Hidden Slow Jets in GRB 060729

The Astrophysical Journal Letters
Gamma-ray bursts (GRBs) are luminous stellar explosions characterized by the ejection of relativistic jets. This work proposes a novel paradigm to study these GRB jets. By analyzing the timing information of prompt pulses and X-ray flares, in conjunction
Jin-Jun Geng, Ding-Fang Hu, Hao-Xuan Gao, Yi-Fang Liang, Yan-Long Hua, Guo-Rui Zhang, Tian-Rui Sun, Bing Li, Yuan-Qi Liu, Fan Xu, Chen Deng, Chen-Ran Hu, Ming Xu, Yong-Feng Huang, Miao-Miao Zhang, Min Fang, Jing-Zhi Yan, Tao An, Xue-Feng Wu   +18 more
doaj   +1 more source

Detecting Stellar Coronal Mass Ejections via Coronal Dimming in the Extreme Ultraviolet

The Astrophysical Journal
Stellar flares and coronal mass ejections (CMEs) can strip planetary atmospheres, reducing the potential habitability of terrestrial planets. While flares have been observed for decades, stellar CMEs remain elusive.
James Paul Mason, Allison Youngblood, Kevin France, Astrid M. Veronig, Meng Jin   +4 more
doaj   +1 more source

Diagnostic Features of Discogenic Low Back Pain: A Narrative Review and Suggested Areas for Future Research and Clinical Practice

JOR SPINE, Volume 9, Issue 2, June 2026.
ABSTRACT Background Chronic low back pain is a leading cause of global disability, with discogenic low back pain (DLBP), mechanically stimulated pain arising from the intervertebral disc, representing an important but often under‐recognized subtype. DLBP arises from chronic structural and metabolic changes within the intervertebral disc, leading to ...
William Roger Peters, Ashish D. Diwan, Mario Giuseppe Zotti   +2 more
wiley   +1 more source

Multiwavelength Campaign Observations of a Young Solar-type Star, EK Draconis. III. Comparison between Starspot Mapping, Zeeman Doppler Imaging, and Multiwavelength Variability

The Astrophysical Journal
Recent simultaneous multiwavelength observations of a nearby young solar-type star EK Draconis (EK Dra) in the optical, H α spectrum, and X-ray, have provided evidence for stellar prominence eruptions associated with superflares.
Kai Ikuta, Kosuke Namekata, Pascal Petit, Vladimir S. Airapetian, Hiroyuki Maehara, Yuta Notsu, Aline A. Vidotto, Keith Gendreau, Sandra V. Jeffers, Stephen Marsden, Julien Morin, Coralie Neiner, Rishi R. Paudel, Daisaku Nogami, Kazunari Shibata   +14 more
doaj   +1 more source

Comparing Solar Structure Detection Methods in SDO/AIA Observations and the Application to Raw Uncalibrated Data

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract Recent advances in solar physics increasingly rely on automated identification of coronal structures using machine learning. Yet most studies emphasize scientific performance without evaluating feasibility for onboard deployment to prioritize downlink observations.
P. Gonidakis, F. Carella, E. Dineva, H‐J. Jeong, P. Antunes, A. Podobas, S. Raptis, V. Toy‐Edens, M. Jin, S. Poedts, J. Magdalenic, G. Miloshevich   +11 more
wiley   +1 more source

Multiwavelength Study of a Superflare on RS CVn–Type Star HD 22468 Triggered at Hard X-Ray by SVOM

The Astrophysical Journal
Detection of stellar flares at hard X-ray is still rare at the current stage. A transient was recently detected by the hard X-ray camera ECLAIRs on board the SVOM mission at 11:39:01.2 UT on 2025 January 09. Simultaneous monitoring in the optical band on
J. Wang, W. J. Xie, F. Cangemi, A. Coleiro, H. L. Li, Y. Xu, X. H. Han, H. Yang, L. P. Xin, X. Mao, J. Zheng, J. J. Jin, G. W. Li, J. Rodriguez, L. Tao, B. Cordier, J. Y. Wei, P. Bacon, N. Bellemont, L. Bouchet, H. B. Cai, C. Cavet, Z. G. Dai, O. Godet, A. Goldwurm, S. Guillot, L. Huang, M. H. Huang, N. Jiang, E. W. Liang, X. M. Lu, S. Schanne, S. Le Stum, Y. L. Qiu, X. G. Wang, X. Y. Wang, C. Wu, L. Zhang, S. N. Zhang, S. J. Zheng   +39 more
doaj   +1 more source

The high energy X-ray probe (HEX-P): Resolving the nature of Sgr A* flares, compact object binaries and diffuse X-ray emission in the Galactic center and beyond

Frontiers in Astronomy and Space Sciences
HEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging (<10″ FWHM) and broad spectral coverage (0.2–80 keV) with an effective area far superior to current facilities’ (including XMM-Newton and NuSTAR).
Kaya Mori, Gabriele Ponti, Gabriele Ponti, Matteo Bachetti, Arash Bodaghee, Jonathan Grindlay, Jaesub Hong, Roman Krivonos, Ekaterina Kuznetsova, Shifra Mandel, Antonio Rodriguez, Giovanni Stel, Shuo Zhang, Tong Bao, Franz Bauer, Maïca Clavel, Benjamin Coughenour, Javier A. García, Julian Gerber, Brian Grefenstette, Amruta Jaodand, Bret Lehmer, Kristin Madsen, Melania Nynka, Peter Predehl, Ciro Salcedo, Daniel Stern, John Tomsick   +27 more
doaj   +1 more source

Do flares in Sagittarius A* reflect the last stage of tidal capture?

, 2006
In recent years the case for the presence of 3-4 10^6 M_sun black hole in our Galactic Center has gained strength from results of stellar dynamics observations and from the detection of several rapid X-ray and IR flares observed in the Sagittarius A ...
Cadez, A., Calvani, M., Gomboc, A., Kostic, U.   +3 more
core   +1 more source

Identifying and Predicting Coronal Mass Ejection Occurrence: Observational Checklists for Space Weather Forecasters

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Ejections of magnetized plasma from the Sun, known as coronal mass ejections, can drive major geomagnetic activity if Earth‐directed, and are therefore monitored by space weather forecasters. The current focus being the forecast of the arrival time of a coronal mass ejection at Earth and the level of geomagnetic impact.
L. M. Green, A. W. James, N. Ngampoopun, S. L. Yardley, K. Waite, E. K. Mottram, J. Hernandez Camero, J. O'kane   +7 more
wiley   +1 more source