Results 61 to 70 of about 2,148 (181)
Journal of Advanced Research, 2013 The solar wind was originally envisioned using a simple dipolar corona/polar coronal hole sources picture, but modern observations and models, together with the recent unusual solar cycle minimum, have demonstrated the limitations of this picture.
Janet G. Luhmann +2 more
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Terrestrial Gamma‐Ray Flash Following Intense Negative Return Stroke Observed With BIMAP‐3D
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 13, 16 July 2026.Abstract We report ground‐based observations of a terrestrial gamma‐ray flash (TGF) associated with a strong negative cloud‐to‐ground lightning strike (‐CG) which occurred near Los Alamos National Laboratory (LANL) in New Mexico, USA. Gamma photons were detected by the Terrestrial High‐energy Observations of Radiation (THOR) instrument, developed at ...
Daniel P. Jensen +4 more
wiley +1 more source
How Are the Abnormally Hot Chromosphere and Corona Heated by the Solar Magnetic Fields?
The Astrophysical JournalThe corona is a structure possessed by stars, including the Sun. The abnormal heating of the solar corona and chromosphere is one of the greatest mysteries in modern astronomy.
K. J. Li +5 more
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The Astrophysical Journal, 2022 Abstract The reconstruction of the differential emission measure (DEM) from observations of spectral line intensities provides information on the temperature distribution of the emission measure in the region observed. The inversion process is known to be highly unstable, and it has been necessary to provide additional constraints, such ...
openaire +2 more sources
The Astrophysical JournalThe intricate behavior of particle acceleration and transport mechanisms complicates the overall efforts in formulating a comprehensive understanding of solar energetic particle (SEP) events; these efforts include observations of low-energy particles ...
S. Bartocci +43 more
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Energy Transport and Heating by Nonthermal Electrons in a Turbulent Solar Flare Environment
The Astrophysical JournalThe impulsive phase of a solar flare is known to generate strong turbulence and to transfer magnetic energy into accelerated electrons. Recognizing the importance of angular diffusion on the dynamics of the accelerated electrons, we extend previous ...
A. Gordon Emslie, Eduard P. Kontar
doaj +1 more source
The Astrophysical JournalCoronal Mass Ejections (CMEs), drivers of the most severe Space Weather disturbances, are often assumed to evolve self-similarly during their propagation.
Alessandro Liberatore +13 more
doaj +1 more source
SuNeRF: 3D Reconstruction of the Solar EUV Corona Using Neural Radiance Fields
The Astrophysical Journal LettersTo understand its evolution and the effects of its eruptive events, the Sun is permanently monitored by multiple satellite missions. The optically thin emission of the solar plasma and the limited number of viewpoints make it challenging to reconstruct ...
Robert Jarolim +10 more
doaj +1 more source
A Double-decker Flux Rope Model for the Solar Eruption on 2012 March 10
The Astrophysical JournalWe present a magnetic configuration of a compound solar eruption observed on 2012 March 10, from NOAA AR 11429 near the disk center, which displayed a soft X-ray sigmoid before the eruption.
Nishu Karna +4 more
doaj +1 more source
A model for heating the super-hot corona in solar active regions
Nature AstronomyWhat physical mechanisms heat the outer solar or stellar atmosphere to million-Kelvin temperatures is a fundamental but long-standing open question. In particular, the solar corona in active region cores contains an even hotter component reaching ten million Kelvin, manifesting as persistent coronal loops in extreme ultraviolet and soft X-ray images ...
Zekun Lu +5 more
openaire +2 more sources