Results 31 to 40 of about 14,596 (161)
From Coronal Holes to Pulsars and Back Again: Learning the Importance of Data
Frontiers in Astronomy and Space Sciences, 2022 Although wanting to become an astronomer from an early age, I ended up in solar physics purely by chance, after first working in high-energy astrophysics.
Y.-M. Wang
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On the Association between Coronal Mass Ejections and Coronal Holes [PDF]
International Astronomical Union Colloquium, 1989 AbstractThe coronal mass ejection (CME) data and the data for coronal holes for the period 1979-1982 are compared locationwise. Out of 79 CMEs whose locations and spans are known, 48 (61%) CMEs are associated with coronal holes. We make a tentative suggestion that probably the mass ejected during solar flares and active prominences may move along the ...
V.K. Verma, M.C. Pande
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Can coronal hole spicules reach coronal temperatures? [PDF]
Astronomy & Astrophysics, 2011 We aim with the present study to provide observational evidences on whether coronal hole spicules reach coronal temperatures. We combine multi-instrument co-observations obtained with the SUMER/SoHO and with the EIS/SOT/XRT/Hinode. The analysed three large spicules were found to be comprised of numerous thin spicules which rise, rotate and descend ...
Madjarska, M. S. +2 more
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DARK JETS IN SOLAR CORONAL HOLES [PDF]
The Astrophysical Journal, 2015 16 pages, 12 figures, submitted to ...
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Multiwavelength Study of Equatorial Coronal-hole Jets [PDF]
The Astrophysical Journal, 2019 Abstract Jets (transient/collimated plasma ejections) occur frequently throughout the solar corona and contribute mass/energy to the corona and solar wind. By combining numerical simulations and high-resolution observations, we have made substantial progress recently on determining the energy buildup and release processes in these jets ...
Pankaj Kumar +5 more
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Heliospheric consequences of solar activity in geophysical and interplanetary phenomena [PDF]
Geofísica Internacional, 2004 We have done an analysis of the total solar magnetic flux, polar coronal hole area and sunspots. We investigate their long term evolution over several solar cycles and their possible relationship with interplanetary shocks, sudden storm commencements at ...
J. F. Valdés Galicia +2 more
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Magnetic Topology and Loop Statistics in Observed Coronal Holes Using Potential Field Modeling
The Astrophysical JournalPotential field source surface (PFSS) models are widely used to study the solar corona and form the basis for solar wind forecasting, yet they often fail to reproduce observed properties of coronal holes.
Stephan G. Heinemann +2 more
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How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation [PDF]
Annales Geophysicae, 2003 Observations from the second Ulysses fast latitude scan show that the global structure of solar wind near solar maximum is much more complex than at solar minimum.
K. Fujiki +8 more
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Astronomy & AstrophysicsThe geometry of a coronal hole (CH) affects the density profile of the reflected part of an incoming global coronal wave (CW). In this study, we perform for the first time magnetohydrodynamic (MHD) simulations of fast-mode MHD waves that interact with CHs of different geometries, such as circular, elliptic, convex, and concave shapes.
I. Piantschitsch +6 more
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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.
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