Results 31 to 40 of about 429,319 (205)
On the Magnetic Nature of Quiet-Sun Chromospheric Grains
The Astrophysical Journal Letters, 2023 Ca ii K grains, i.e., intermittent, short-lived (about 1 minute), periodic (2–4 minutes), pointlike chromospheric brightenings, are considered to be the manifestations of acoustic waves propagating upward from the solar surface and developing into shocks
María Jesús Martínez González +4 more
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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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Is the Polar Region Different from the Quiet Region of the Sun?
, 2010 Observations of the polar region of the Sun are critically important for understanding the solar dynamo and the acceleration of solar wind. We carried out precise magnetic observations on both the North polar region and the quiet Sun at the East limb ...
Bellot Rubio +17 more
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Energy and helicity budgets of solar quiet regions
, 2014 We investigate the free magnetic energy and relative magnetic helicity budgets of solar quiet regions. Using a novel non-linear force-free method requiring single solar vector magnetograms we calculate the instantaneous free magnetic energy and relative ...
Georgoulis, M. K. +3 more
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Astronomy & AstrophysicsContext. The solar chromosphere is a dynamic and crucial interface between the solar interior and its interplanetary environment, regulating how energy is locally deposited into heat and transported into the upper atmospheric layers.
Noraz Q., Carlsson M., Aulanier G.
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The dark side of solar photospheric G-band bright points
, 2016 Bright small-scale magnetic elements found mainly in intergranular lanes at the solar surface are named bright points (BPs). They show high contrasts in Fraunhofer G-band observations and are described by nearly vertical slender flux tubes or sheets.
Riethmüller, T. L., Solanki, S. K.
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Bright Points in the Internetwork Quiet Sun
The Astrophysical Journal, 2004 High resolution G-band images of the interior of a supergranulation cell show ubiquitous Bright Points (some 0.3 BPs per Mm^2). They are located in intergranular lanes and often form chains of elongated blobs whose smallest dimension is at the resolution limit (135 km on the Sun). Most of them live for a few minutes, having peak intensities from 0.8 to
Almeida, J. S. +4 more
openaire +3 more sources
Magnetic properties of photospheric regions having very low magnetic flux
, 2001 The magnetic properties of the quiet Sun are investigated using a novel inversion code, FATIMA, based on the Principal Component Analysis of the observed Stokes profiles.
Bianda M. +13 more
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Evidence for Wave Heating of the Quiet Sun Corona [PDF]
, 2014 We have measured the energy and dissipation of Alfvenic waves in the quiet Sun. A magnetic field was used to infer the location and orientation of the magnetic field lines along which the waves are expected to travel.
Hahn, Michael, Savin, Daniel Wolf
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Simulating Siberian Radioheliograph response to the quiet Sun
Solar-Terrestrial Physics, 2018 The Siberian Radioheliograph (SRH) correlation plot is the time dependence of the sum of absolute values of complex correlations over all baselines. These plots are built for each operating frequency of SRH.
Lesovoi S.V., Kobets V.S.
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