Results 21 to 30 of about 11,707 (261)
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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Statistical Features of the Quiet Sun in EUV [PDF]
Symposium - International Astronomical Union, 2001 Frequency distributions of the intensities of EUV emission lines in the quiet Sun have in the past usually been modelled using two Gaussians. Here we test this and other distribution functions against observed distributions with exceptional statistics. The data were obtained in a number of spectral lines observed with CDS and SUMER.
Pauluhn, A. +4 more
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PERVASIVE LINEAR POLARIZATION SIGNALS IN THE QUIET SUN [PDF]
The Astrophysical Journal, 2012 This paper investigates the distribution of linear polarization signals in the quiet Sun internetwork using ultra-deep spectropolarimetric data. We reduce the noise of the observations as much as is feasible by adding single-slit measurements of the Zeeman-sensitive Fe I 630 nm lines taken by the Hinode spectropolarimeter. The integrated Stokes spectra
Bellot Rubio, Luis R. +1 more
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Structure of the Solar Atmosphere: A Radio Perspective
Frontiers in Astronomy and Space Sciences, 2020 Solar radio emission has been providing information about the Sun for over half a century. In order to fully exploit this information, one needs to have a broader view of the solar atmosphere, which cannot be provided by radio observations alone.
Costas E. Alissandrakis
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Mapping the Hidden Magnetic Field of the Quiet Sun [PDF]
The Astrophysical Journal Letters, 2021 Abstract The Sun is the only star where we can resolve the intricate magnetism that all convective stars harbor. Yet, more than 99% of its visible surface along the solar cycle (the so-called quiet Sun) is filled with a tangled, unresolved magnetism.
J. C. Trelles Arjona +2 more
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ON THE PROPAGATION OF RADIO EMISSION IN THE CROWN OF THE QUIET SUN WITH MAGNETIC FIELD
Odessa Astronomical Publications, 2013 There are searching for factors that influence on the brightness temperature distribution of the quiet Sun at decameter radio waves which may explain the ellipsoidal shape and other features in the radio brightness profile.
N. Tsvyk
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Formation of the Transition Region for the Quiet Sun
The Astrophysical Journal Letters, 2023 We propose a partially ionized collisional two-fluid model of the formation of the transition region between the cool dense chromosphere and hot tenuous corona for the quiet Sun.
Paul Song, Jiannan Tu, David B. Wexler
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Quiet Sun Magnetic Fields [PDF]
, 2022 Gegenstand dieser Doktorarbeit ist das Studium der Magnetischen Felder auf der "ruhigen Sonne". Diese Felder rhren von sehr kleinskaligen Bereichen auf der sonst "magnetfeldfreien" Sonnenoberfläche her und sind deshalb nur durch schwache Polarisationssignale gekennzeichnet.
Domínguez Cerdeña, Itahiza Francisco +3 more
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Propagating and Stationary Bright Knots in the Quiet Sun
The Astrophysical Journal Letters, 2022 The question of what heats the solar chromosphere and corona remains one of the most important puzzles in solar physics and astrophysics. Up to now, two mechanisms are considered to work in heating the chromosphere and corona: magnetic reconnection and ...
Jun Zhang +9 more
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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