Results 61 to 70 of about 19,921 (169)
The Astrophysical JournalWe explore the empirical power-law relationship between X-ray luminosity ( L _X ) and total surface magnetic flux (Φ), established across solar magnetic elements, time- and disk-averaged emission from the Sun, older active stars, and pre-main-sequence ...
Konstantin V. Getman +11 more
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Improving Solar Flare Nowcasting with the Hot Onset Precursor Event Technique
The Astrophysical JournalThis study investigates the statistical behavior of plasma properties during hot onset precursor events (HOPEs) of solar flares and evaluates their potential for improving flare nowcasting.
Anant Telikicherla +2 more
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X-ray stellar feedback in low-metallicity starbursts
Astronomy & AstrophysicsContext. The X-ray output of low-metallicity starburst galaxies is a key component of stellar feedback, tracing the processes responsible for gas ionization and chemical enrichment.
Chatzis M. +9 more
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Localizing Quasiperiodic Pulsations in Hard X-Ray, Microwave, and Lyα Emissions of an X6.4 Flare
The Astrophysical JournalWe report the simultaneous observations of quasiperiodic pulsations (QPPs) in wavelengths of hard X-ray (HXR), microwave, Ly α , and ultraviolet (UV) emissions during the impulsive phase of an X6.4 flare on 2024 February 22 (SOL2024-02-22T22:08).
Dong Li +3 more
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Unraveling the Origins of an Extreme Solar Eruptive Event with Hard X-Ray Imaging Spectroscopy
The Astrophysical JournalHard X-ray (HXR) observations are crucial for understanding the initiation and evolution of solar eruptive events, as they provide a key signature of flare-accelerated electrons and heated plasma. The potential of high-cadence HXR imaging for deciphering
Juliana T. Vievering +2 more
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The Astrophysical JournalVariations in X-ray and extreme ultraviolet (EUV) irradiance during solar flares lead to a noticeable increase in the electron concentration in the illuminated part of the Earth’s ionosphere.
Susanna Bekker +2 more
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Statistical Analysis of Compact Single-source Flares Observed by STIX
The Astrophysical JournalX-ray emissions from solar flares provide a comprehensive overview of the spatial and spectral behaviors of high-temperature plasma in the solar atmosphere.
Michalina Litwicka +6 more
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The Astrophysical JournalThe disparate nature of the thermal–nonthermal energy partition during flares, particularly during weak flares, is still an open issue. Following the Neupert effect, quantifying the relative yield of X-ray emission in different energy bands can enable ...
Arun Kumar Awasthi +5 more
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Spatial and Temporal Distribution of Nanoflare Heating during Active Region Evolution
The Astrophysical JournalNanoflares are believed to be key contributors to heating solar nonflaring active regions, though their individual detection remains challenging. This study uses a data-driven field-aligned hydrodynamic model to examine nanoflare properties throughout ...
Biswajit Mondal +4 more
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Eruption-Related Ultraviolet Irradiance Enhancements Associated with Flares. [PDF]
Sol PhysMajury L +5 more
europepmc +1 more source