Results 51 to 60 of about 14,596 (161)
The Astrophysical Journal, 2023 Differential emission measure (DEM) inversion methods use the brightness of a set of emission lines to infer the line-of-sight (LOS) distribution of the electron temperature ( T _e ) in the corona.
Benjamin Boe +2 more
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Validation of Long-term Solar Coronal Modeling Using FORWARD
The Astrophysical Journal Supplement SeriesThis research aims to evaluate the capabilities of two of the most widely used coronal models over multiple solar cycles and to study variations in solar coronal structures over an extended period across multiple channels. We have created a comprehensive
Gergely Koban +4 more
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Estimating the Poynting Flux of Alfvénic Waves in Polar Coronal Holes across Solar Cycle 24
The Astrophysical JournalAlfvénic waves are known to be prevalent throughout the corona and solar wind. Determining the Poynting flux supplied by the waves is required for constraining their role in plasma heating and acceleration, as well as providing a constraint for Alfvén ...
R. J. Morton +3 more
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On the Existence of Long-period Decayless Oscillations in Short Active Region Loops
The Astrophysical JournalDecayless kink oscillations, characterized by their lack of decay in amplitude, have been detected in coronal loops of varying scales in active regions, the quiet Sun, and coronal holes. Short-period (
Arpit Kumar Shrivastav +7 more
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The Astrophysical JournalCoronal holes are recognized as the primary sources of heliospheric open magnetic flux (OMF). However, a noticeable gap exists between in situ measured OMF and that derived from remote-sensing observations of the Sun.
Stephan G. Heinemann +14 more
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What drives solar-EUV jets seen in equatorial coronal holes?
Results in Physics, 2016 Recent observations of jets in solar coronal holes that include multi-wavelength data such as EUV movies have shown that most of those jets are not driven in the way suggested by the standard model.
M.L. Adams, R.L. Moore
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Responses of a Coronal Hole to a Fast Flare-driven Coronal Wave
The Astrophysical Journal LettersAbstract Coronal waves, significant solar phenomena, act as diagnostic tools for scientists studying solar atmosphere properties. Here, we present a novel observation detailing how a coronal wave event, associated with an X5.0 class flare, influenced the properties of an adjacent coronal hole (CH) through interaction.
Xiaofan Zhang +14 more
openaire +3 more sources
Journal of Physics: Conference Series, 2020 Abstract Modelling with high accuracy the open magnetic field and the fast solar wind in the heliosphere is essential for space weather forecasting purposes. Primary sources of open magnetic field flux are Coronal Holes (CH), uni-polar regions that appear as dark patches in the solar corona when observed in X-ray and extreme-ultraviolet (
Asvestari, E. +6 more
openaire +2 more sources
The Astrophysical Journal LettersWhile the amount of solar coronal energy flux leaving the “quiet” Sun, coronal holes, and active regions has been estimated by many, similar calculations for transients like coronal mass ejections (CMEs) based on observations are few. Using spectroscopic
R. Ramesh +5 more
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Improvements on coronal hole detection in SDO/AIA images using supervised classification
Journal of Space Weather and Space Climate, 2015 We demonstrate the use of machine learning algorithms in combination with segmentation techniques in order to distinguish coronal holes and filaments in SDO/AIA EUV images of the Sun.
Reiss Martin A. +7 more
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