Results 231 to 240 of about 280,119 (256)
Some of the next articles are maybe not open access.
The Magnetic Nature of Coronal Holes
Science, 1996Solar wind streams originate from low-density, magnetically open regions of the sun's corona, known as coronal holes. The locations, areal sizes, rotation, and solar-cycle evolution of these regions can be reproduced and understood by applying simple extrapolation models to measurements of the photospheric magnetic field.
Yi-Ming Wang +2 more
openaire +1 more source
Statistical Studies of Coronal Mass Ejections and Coronal Holes
Geomagnetism and Aeronomy, 2017Statistical studies of coronal mass ejections (CMEs) and coronal holes (CHs) are reviewed. The work summarizes the historical and current results of statistical studies of CMEs and CHs and their parameters that have been obtained by various authors who considered these phenomena as independent manifestations of solar activity, as well as their mutual ...
openaire +1 more source
Energy budget in coronal holes
Solar Physics, 1973EUV and radio observation, supplemented by other data, have made it possible to determine the flux of energy, F sub c, conducted from the corona into the chromosphere. Of the mechanical flux input in the corona, F sub m (of which F sub c is a large fraction), there are no direct measurements but limits can be found to it.
openaire +1 more source
On the Visibility of Coronal Holes in Microwaves
Central European astrophysical bulletin, 2007Previous observations indicate that coronal holes generally appear as low brightness temperature regions in microwaves. However, within their borders local enhancements of radiation often occur. This is confirmed by comparing a full-disc solar image obtained at 37 GHz on 27 May 1993 with full-disc solar images obtained at various wavelengths. Microwave
Brajša, Roman +2 more
openaire +2 more sources
Energetics of Solar Coronal Holes
1991We examine the energetics of a solar coronal hole in the framework of magnetohydrodynamics (MHD). Given typical values of the observed parameters, it is estimated that the Poynting flux maintained by the solar rotation and a trailing magnetic field is potentially capable of driving and heating a wind stream in a coronal hole region.
openaire +1 more source
Activity Complexes and Coronal Holes on the Sun: Relationship Phenomenology
Astronomy Reports, 2023S A Yazev
exaly
Statistical Approach on Differential Emission Measure of Coronal Holes using the CATCH Catalog
Solar Physics, 2021Stefan Hofmeister +2 more
exaly
The Evolution of Coronal Holes over Three Solar Cycles Using the McIntosh Archive
Solar Physics, 2020Ian Hewins, Sarah Gibson, S W McIntosh
exaly