Results 11 to 20 of about 10,729 (219)
Interplanetary and solar surface properties of coronal holes observed during solar maximum [PDF]
Journal of Geophysical Research: Space Physics, 2003 Data from the Solar Wind Ion Composition Spectrometer (SWICS) on board the Ulysses spacecraft and synoptic maps from Kitt Peak are used to analyze the relatively short‐lived coronal holes which exist during the maximum phase of the solar activity cycle 23. They are compared with the persistent polar coronal holes which prevail around solar minimum.
Zhang, J. +4 more
openaire +4 more sources
Morphology, dynamics and plasma parameters of plumes and inter-plume regions in solar coronal holes
Astronomy and Astrophysics Review, 2011 Coronal plumes, which extend from solar coronal holes (CH) into the high corona and - possibly - into the solar wind (SW), can now continuously be studied with modern telescopes and spectrometers on spacecraft, in addition to investigations from the ...
Abbo, L. +14 more
core +5 more sources
Interchange reconnection as the source of the fast solar wind within coronal holes. [PDF]
Nature, 2023 Bale SD +16 more
europepmc +2 more sources
Variations in Daily Maximum Areas and Longitudinal Widths of Solar Coronal Holes in 2017–2020
Universe, 2022 We considered coronal holes as a manifestation of the large-scale magnetic field of the Sun. The main goal of this work was to study the variations in the largest areas and longitudinal widths of solar coronal holes observed daily in the polar and mid ...
Alexandr Riehokainen +6 more
doaj +1 more source
Estimating Ion Temperatures at the Polar Coronal Hole Boundary
The Astrophysical Journal, 2023 The temperatures of the heavy ions ( T _i ) in the solar corona provide critical information about the heating mechanism of the million-degree corona.
Yingjie Zhu, Judit Szente, Enrico Landi
doaj +1 more source
Journal of Space Weather and Space Climate, 2021 We discuss the significant implications of three eye-witness drawings of the total solar eclipse on 1706 May 12 in comparison with two on 1715 May 3, for our understanding of space climate change.
Hayakawa Hisashi +5 more
doaj +1 more source
Solar Mass Ejections and Coronal Holes [PDF]
International Astronomical Union Colloquium, 1996 AbstractIn this paper we present observations of two types of solar mass ejections, which seem to be associated with the location of coronal holes. In the first type, a filament eruption was observed near a coronal hole, which gave rise to a strong interplanetary scintillations, as detected by IPS observations.
openaire +1 more source
DARK JETS IN SOLAR CORONAL HOLES [PDF]
The Astrophysical Journal, 2015 16 pages, 12 figures, submitted to ...
openaire +2 more sources
The Astrophysical Journal Letters, 2023 We propose that coronal heating in EUV coronal plumes is weaker, not stronger, than in adjacent nonplume coronal magnetic funnels. This expectation stems from (i) the observation that an EUV plume is born as the magnetic flux at the foot of the plume’s ...
Ronald L. Moore +3 more
doaj +1 more source
The Dependence of the Peak Velocity of High-Speed Solar Wind Streams as Measured in the Ecliptic by ACE and the STEREO satellites on the Area and Co-Latitude of their Solar Source Coronal Holes [PDF]
, 2018 We study the properties of 115 coronal holes in the time‐range from 2010/08 to 2017/03, the peak velocities of the corresponding high‐speed streams as measured in the ecliptic at 1AU, and the corresponding changes of the Kp index as marker of their geo ...
Heber, Bernd +5 more
core +2 more sources