Results 81 to 90 of about 995 (183)

Solar Flares as Electron Accelerators: Toward a Resolution of the Acceleration Efficiency Issue

The Astrophysical Journal
A major open issue concerning the active Sun is the effectiveness with which magnetic reconnection accelerates electrons in flares. A paper published by Nature in 2022 used microwave observations to conclude that the Sun is an almost ideal accelerator ...
Anna Volpara, Paolo Massa, Michele Piana, Anna Maria Massone, A. Gordon Emslie   +4 more
doaj   +1 more source

Real-time detection of solar flares from ground-based VLF data

Journal of Space Weather and Space Climate
A method for real-time solar flare detection and characterization using ground-based Very Low Frequency (VLF, 15–45 kHz) data is presented. The D-region, the ionosphere’s lowest region, is monitored by VLF waves propagating in the Earth-Ionosphere ...
Teysseyre Pauline, Briand Carine, Cohen Morris   +2 more
doaj   +1 more source

A Seven-day Multiwavelength Flare Campaign on AU Mic. III. Quiescent and Flaring Properties of the X-Ray Spectra and Chromospheric Lines

The Astrophysical Journal
We present the X-ray quiescent and flaring properties from a unique, 7 days multiwavelength observing campaign on the M1 flare star AU Mic. Combining the XMM-Newton X-ray spectra with the chromospheric line and broadband near-UV (NUV) and optical ...
Yuta Notsu, Isaiah I. Tristan, Rachel A. Osten, Alexander Brown, Adam F. Kowalski, Carol A. Grady   +5 more
doaj   +1 more source

Unveiling Mass Transfer in Solar Flares: Insights from Elemental Abundance Evolutions Observed by Chang’E-2 Solar X-Ray Monitor

The Astrophysical Journal
Understanding how elemental abundances evolve during solar flares helps shed light on the mass and energy transfer between different solar atmospheric layers. However, prior studies have mostly concentrated on averaged abundances or specific flare phases,
Man-Hei Ng, Chi-Long Tang, Xiaoping Zhang, Kuan-Vai Tam, Peng-Fei Chen, Wudong Dong, Jing Li, Chi-Pui Tang   +7 more
doaj   +1 more source

Solar Doppler Velocity Results from the SDO EVE Level 4 Lines Data Product. [PDF]

Sol Phys
Woods TN, Chamberlin PC, Crotser D, Jones A, Borelli R, Woodraska D, Gonzalez G.   +6 more
europepmc   +1 more source

In-Flight Self-Calibration of the STIX Grid Transmission. [PDF]

Sol Phys
Massa P, Volpara A, Stiefel MZ, Bilgili E, Degen M, Limousin O, Hurford GJ, Krucker S.   +7 more
europepmc   +1 more source

The Behaviour of the EUV Corona Before Flares in Regions with High Free Magnetic Energy. [PDF]

Sol Phys
Harra L, Kusano K, Zhu Y, Barczynski K, De-Sassi A, Stiefel MZ, Kontogiannis I, West MJ, Brooks DH.   +8 more
europepmc   +1 more source

Revealing Flare Energetics and Dynamics with SDO EVE Solar Extreme Ultraviolet Spectral Irradiance Observations. [PDF]

Sol Phys
Woods TN, Chamberlin PC, Jones A, Mason JP, Qian L, Warren HP, Woodraska D, Borelli R, Eparvier FG, Gonzalez G.   +9 more
europepmc   +1 more source

Solar Flare Detection from Sudden Ionospheric Disturbances in VLF Signals via a CNN-HMM Framework. [PDF]

Sensors (Basel)
Velchev Y, Bonev B, Iliev I, Gallagher P, Petkov PZ, Nachev I.   +5 more
europepmc   +1 more source

Solar Cycle Variation of Sustained Gamma Ray Emission from the Sun. [PDF]

Sol Phys
Gopalswamy N, Mäkelä P, Yashiro S, Akiyama S, Xie H, Sindhuja G.   +5 more
europepmc   +1 more source