Results 21 to 30 of about 429,319 (205)
First limits on the 3-200 keV X-ray spectrum of the quiet Sun using RHESSI [PDF]
, 2007 We present the first results using the Reuven Ramaty High-Energy Solar Spectroscopic Imager, RHESSI, to observe solar X-ray emission not associated with active regions, sunspots or flares (the quiet Sun).
Dolan J. F. +7 more
core +1 more source
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
doaj +1 more source
Quiet Sun magnetic fields: an observational view
Living Reviews in Solar Physics, 2019 The quiet Sun is the region of the solar surface outside of sunspots, pores, and plages. In continuum intensity it appears dominated by granular convection.
Luis Bellot Rubio, David Orozco Suárez
doaj +1 more source
First NuSTAR Limits on Quiet Sun Hard X-Ray Transient Events [PDF]
, 2017 We present the first results of a search for transient hard X-ray (HXR) emission in the quiet solar corona with the \textit{Nuclear Spectroscopic Telescope Array} (\textit{NuSTAR}) satellite. While \textit{NuSTAR} was designed as an astrophysics mission,
Boggs, Steven E. +18 more
core +5 more sources
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
doaj +1 more source
Vigorous convection in a sunspot granular light bridge [PDF]
, 2014 Light bridges are the most prominent manifestation of convection in sunspots. The brightest representatives are granular light bridges composed of features that appear to be similar to granules.
Danilovic, Sanja +3 more
core +1 more source
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
openaire +2 more sources
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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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
doaj +1 more source
DEM Study of Selected Quiet Sun Regions [PDF]
Symposium - International Astronomical Union, 2001 In the present work EUV spectra of quiet Sun regions, observed with the Coronal Diagnostic Spectrometer (CDS) on SOHO, are analysed in order to determine the Differential Emission Measure (DEM) of selected areas of the field of view. The purpose of the present work is to study the differences between the DEM curves of the quiet Sun cell centers areas ...
Gontikakis, C. +4 more
openaire +2 more sources