Results 1 to 10 of about 1,261,581 (220)
Living Reviews in Solar Physics, 2009 Coronal holes are the darkest and least active regions of the Sun, as observed both on the solar disk and above the solar limb. Coronal holes are associated with rapidly expanding open magnetic fields and the acceleration of the high-speed solar wind ...
Steven R. Cranmer
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Chromosphere Activity Relation with Solar Dynamo Magnetic Activity Cycle [PDF]
Iranian Journal of Astronomy and Astrophysics, 2022 In this article, we analyzed the abnormal thickness of the chromosphere above the coronal holes (CH) at the poles of the Sun for 13 years (2010-2022), on the 15th of every month, by using AIA/SDO telescope data.
Ehsan Tavabi, Mina Rajabi, Sima Zeighami
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The Astrophysical Journal, 2023 This paper is dedicated to the new implicit unstructured coronal code COCONUT, which aims at providing fast and accurate inputs for space-weather forecasting as an alternative to empirical models.
Barbara Perri +7 more
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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
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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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The Astrophysical Journal Letters, 2023 The omnipresence of transient fluctuations in the solar wind, such as switchbacks (SBs) and small-scale magnetic flux ropes (SMFRs), have been well observed by the in situ observation of Parker Solar Probe (PSP), yet their sources are not clear. Possible
Nengyi Huang +2 more
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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
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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
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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
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Antarctic Record, 1980 This is an attempt to identify the causes of geomagnetic storms which occurred during a year and a half from January 1977 to June 1978. The assignment of geomagnetic storm causation to appropriate coronal holes or solar flares has been made by ...
Katsuhide MARUHASHI, Takahiroo ISHI
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