Results 11 to 20 of about 11,707 (261)
The quiet sun at mm wavelengths as seen by ALMA
Frontiers in Astronomy and Space Sciences, 2022 Solar observations at sub-mm, mm and cm wavelengths offer a straightforward diagnostic of physical conditions in the solar atmosphere because they yield measurement of brightness temperature which, for optically thick features, equals intrinsic ...
Costas E. Alissandrakis +2 more
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Photospheric Swirls in a Quiet-Sun Region
The Astrophysical JournalSwirl-shaped flow structures have been observed throughout the solar atmosphere, in both emission and absorption, at different altitudes and locations, and are believed to be associated with magnetic structures. However, the distribution patterns of such
Quan Xie +4 more
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Quantifying Poynting Flux in the Quiet Sun Photosphere
The Astrophysical Journal, 2023 Poynting flux is the flux of magnetic energy, which is responsible for chromospheric and coronal heating in the solar atmosphere. It is defined as a cross product of the electric and magnetic fields, and in ideal MHD conditions it can be expressed in ...
Dennis Tilipman +5 more
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MAGNETIC LOOPS IN THE QUIET SUN [PDF]
The Astrophysical Journal, 2010 accepted for ApJL Sunrise special issue, 8 Pages, 4 ...
Wiegelmann, T. +11 more
openaire +3 more sources
British Educational Research Journal, EarlyView., 2023 Abstract Children's relationship with time in preschools is an under‐researched area. Young children rarely know how to measure time using a clock, but their experiences of time may contribute to understanding children's well‐being and debates about quality in preschools.
Kristín Dýrfjörð +3 more
wiley +1 more source
MAGNETIC BRIGHT POINTS IN THE QUIET SUN [PDF]
The Astrophysical Journal, 2010 We present a visual determination of the number of bright points (BPs) existing in the quiet Sun, which are structures though to trace intense kG magnetic concentrations. The measurement is based on a 0.1 arcsec angular resolution G-band movie obtained with the Swedish Solar Telescope at the solar disk center.
Sanchez Almeida, J +3 more
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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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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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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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CAII lines in a quiet region on the Sun I. Dynamic processes in the solar atmosphere
Solar-Terrestrial Physics, 2023 We have studied oscillation processes in the quiet Sun outside a coronal hole at different levels of the solar chromosphere. The study was based on spectroscopic observations of ionized calcium lines (K, H, and 849.8 nm) obtained by the Sayan Solar ...
Turova I. P. +2 more
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