Results 11 to 20 of about 1,249,380 (278)
In the Year of the Quiet Sun configures moments from the grand project of mid-20th Century Pan-Africanism, envisaged as the total liberation of the African continent from Europe’s Empires, through the media of animation, video, interior decor, display ...
Eshun, Kodwo
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Hierarchical analysis of the quiet-Sun magnetism [PDF]
Astronomy & Astrophysics, 2014 Standard statistical analysis of the magnetic properties of the quiet Sun rely on simple histograms of quantities inferred from maximum-likelihood estimations. Because of the inherent degeneracies, either intrinsic or induced by the noise, this approach is not optimal and can lead to highly biased results.
Ramos, A. Asensio +1 more
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Long-lived particles and the quiet Sun [PDF]
Physical Review DThe nuclear reaction network within the interior of the Sun is an efficient MeV physics factory and can produce long-lived particles generic to dark sector models. In this work we consider the sensitivity of satellite instruments, primarily the RHESSI spectrometer, that observe the quiet Sun in the MeV regime where backgrounds are low.
R. Andrew Gustafson +3 more
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What Can DKIST/DL-NIRSP Tell Us about Quiet-Sun Magnetism?
The Astrophysical JournalQuiet-Sun regions cover most of the Sun's surface; their magnetic fields contribute significantly to solar chromospheric and coronal heating. However, characterizing the magnetic fields of the quiet Sun is challenging due to their weak polarization ...
Jiayi Liu +3 more
doaj +4 more sources
Transport of Cosmic-Ray Electrons from 1 au to the Sun
The Astrophysical Journal, 2023 Gamma rays are produced by cosmic-ray (CR) protons interacting with the particles at the solar photosphere and by CR electrons and positrons (CRes) via inverse Compton scattering of solar photons.
Vahé Petrosian +2 more
doaj +1 more source
Fleeting Small-scale Surface Magnetic Fields Build the Quiet-Sun Corona
The Astrophysical Journal Letters, 2023 Arch-like loop structures filled with million Kelvin hot plasma form the building blocks of the quiet-Sun corona. Both high-resolution observations and magnetoconvection simulations show the ubiquitous presence of magnetic fields on the solar surface on ...
L. P. Chitta +21 more
doaj +1 more source
The quiet-Sun photosphere and chromosphere [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012 Abstract The overall structure and the fine structure of the solar photosphere outside active regions are largely understood, except possibly the important roles of a turbulent near-surface dynamo at its bottom, internal gravity waves at its top and small-scale vorticity. Classical one-dimensional static radiation-escape modelling has
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The dynamic chromosphere at millimeter wavelengths
Frontiers in Astronomy and Space Sciences, 2022 The chromosphere is one of the most complex and dynamic layers of the solar atmosphere. The dynamic phenomena occur on different spatial and temporal scales, not only in active regions but also in the so-called quiet Sun.
Alexander Nindos +5 more
doaj +1 more source
Quantifying and containing the curse of high resolution coronal imaging [PDF]
Annales Geophysicae, 2008 Future missions such as Solar Orbiter (SO), InterHelioprobe, or Solar Probe aim at approaching the Sun closer than ever before, with on board some high resolution imagers (HRI) having a subsecond cadence and a pixel area of about (80 km)2 at the Sun ...
V. Delouille +2 more
doaj +1 more source
Substructure of quiet sun bright points [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractSince photospheric bright points (BPs) were first observed, there has been a question as to how are they structured. Are they just single flux tubes or a bundle of the flux-tubes? Surface photometry of the quiet Sun (QS) has achieved resolution close to 0.1″ with the New Solar Telescope at Big Bear Solar Observatory.
Andic, Aleksandra +2 more
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