Results 51 to 60 of about 3,043 (224)
Solar Chromospheric Heating by Kinetic Alfvén Waves Based on the Three-fluid Model
The Astrophysical JournalThe heating mechanism of the solar chromosphere with a partially ionized plasma has been one of the challenging problems in solar physics. Kinetic Alfvén waves (KAWs) have been applied by many authors to study the heating of the corona and chromosphere ...
Jin-Run Ou +3 more
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Solar-Terrestrial Physics, 2019 In this paper, we review observational aspects of three common small-scale energetic events in the solar transition region (TR), namely TR explosive events, ultraviolet bursts and jets.
Zhenghua Huang, Bo Li, Lidong Xia
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Structure of the Solar Atmosphere: A Radio Perspective
Frontiers in Astronomy and Space Sciences, 2020 Solar radio emission has been providing information about the Sun for over half a century. In order to fully exploit this information, one needs to have a broader view of the solar atmosphere, which cannot be provided by radio observations alone.
Costas E. Alissandrakis
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Extreme Red-wing Enhancements of UV Lines during the 2022 March 30 X1.3 Solar Flare
The Astrophysical Journal, 2023 Here, we present the study of a compact emission source during an X1.3 flare on 2022 March 30. Within a ∼41 s period (17:34:48 UT to 17:35:29 UT), Interface Region Imaging Spectrograph observations show spectral lines of Mg ii , C ii , and Si iv with ...
Yan Xu +5 more
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.Abstract Solar superflares of S‐class (>X10 in soft X‐rays) pose extreme space weather hazards, yet their prediction remains a fundamental challenge owing to their rapid and transient natures and the limitations of conventional event‐based forecasts. We introduce for the first time, a probabilistic spatiotemporal framework designed to identify extended
V. M. Velasco Herrera +12 more
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Multiwavelength studies of MHD waves in the solar chromosphere: An overview of recent results [PDF]
, 2015 The chromosphere is a thin layer of the solar atmosphere that bridges the relatively cool photosphere and the intensely heated transition region and corona. Compressible and incompressible waves propagating through the chromosphere can supply significant
Jess, D.B. +20 more
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Effect of Magnetic Diffusion in the Chromosphere on the Solar Wind
The Astrophysical JournalWe investigate nonideal magnetohydrodynamical (MHD) effects in the chromosphere on the solar wind by performing MHD simulations for Alfvén-wave-driven winds, explicitly including ohmic and ambipolar diffusion.
Masato Matsuoka +3 more
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Formation of the Lyman Continuum during Solar Flares
The Astrophysical Journal, 2023 The Lyman continuum (LyC;
Shaun A. McLaughlin +5 more
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Space Weather Impact of Three Solar Flares Observed by the POEMAS Telescope at 45 and 90 GHz
Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.Abstract Solar flares are often associated with coronal mass ejections (CMEs) that, when directed toward Earth, can disrupt the magnetosphere and impact space weather. In this study, we investigate three long‐duration solar flares observed in 2012 by the POlarization Emission of Millimeter Activity at the Sun (POEMAS) telescopes at 45 and 90 GHz.
Adriana Valio +4 more
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Calcium Bright Knots and the Formation of Chromospheric Anemone Jets on the Sun
The Astrophysical Journal LettersSpace-based observations show that the solar atmosphere from the solar chromosphere to the solar corona is filled with small-scale jets and is linked with small-scale explosions.
Kunwar Alkendra Pratap Singh +2 more
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