Results 11 to 20 of about 429,319 (205)
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
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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
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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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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
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Quiet Sun coronal heating: A statistical model [PDF]
Astronomy & Astrophysics, 2002 Recent observations of Krucker & Benz (1998) give strong support to Parker's hypothesis (Parker 1988) that small scale dissipative events make the main contribution to quiet Sun coronal heating. They also showed that these small scale events are associated not only with the magnetic network, but also with the cell interiors (Benz & Krucker ...
Krasnoselskikh, Vladimir +3 more
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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
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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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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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A nanoflare model of quiet Sun EUV emission [PDF]
, 2006 Nanoflares have been proposed as the main source of heating of the solar corona. However, detecting them directly has so far proved elusive, and extrapolating to them from the properties of larger brightenings gives unreliable estimates of the power-law ...
A. Pauluhn +24 more
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PRELIMINARY RESULTS OF INTERFEROMETRIC OBSERVATIONS OF THE QUIET SUN AT THE FREQUENCIES 8 – 32 MHZ
Odessa Astronomical Publications, 2018 We studied a radio emission of the quiet Sun at decameter wavelengths to determine its angular dimensions. Observations were conducted using interferometers composed of antenna sections of the UTR-2 radio telescope.
V. A. Shepelev +2 more
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