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First Detection of Solar Neutrinos from the CNO Cycle with Borexino
AbstractStars are fuelled by the fusion of hydrogen into helium via two processes: the ‘‘ pp chain’’ and the ‘‘CNO cycle.’’ Neutrinos emitted in the...
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Reconstructing Sunspot Number by Forward-Modelling Open Solar Flux
The open solar flux (OSF) is the integrated unsigned magnetic flux leaving the top of the solar atmosphere to form the heliospheric magnetic field....
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Status of direct determination of solar neutrino fluxes after Borexino
We determine the solar neutrino fluxes from the global analysis of the most up-to-date terrestrial and solar neutrino data including the final...
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Solar Wind or Solar Breeze?
Long before the advent of research enabled by rockets, scientists speculated about the physical processes external to stars. That is, in addition to...
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Solar cycle variations of the EUV network characteristics from SDO/AIA
It is well-known that there is a close relationship between the supergranules, magnetic field and the Extreme-UltraViolet (EUV) network of the solar...
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Solar Flares
This chapter deals with solar flares, the first sporadic, short-duration events of solar activity discovered more than and a century and a half ago....
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Solar Cycle Dependence of ICME Composition
Coronal mass ejections (CMEs) belong to the most energetic explosions in the solar atmosphere, and their occurrence rates exhibit obvious solar cycle...
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Long-Term Modulation of Solar Cycles
Solar activity has a cyclic nature with the ≈11-year Schwabe cycle dominating its variability on the interannual timescale. However, solar cycles are...
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Extreme Space-Weather Events and the Solar Cycle
Space weather has long been known to approximately follow the solar cycle, with geomagnetic storms occurring more frequently at solar maximum than...
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Helio-latitude Dependence of the Solar Wind Parameters and the Magneto-Gravitational Dragging of the Solar Wind
A theoretical model of the magnetic-field coupling to the background gravitational field of a rotating Sun-like star is used here to calculate the...
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Temporal variability of galactic cosmic ray intensity and its dependence on various solar parameters observed during solar cycles 23 and 24
In this study, we have investigated the solar modulation of galactic cosmic rays (GCRs) during solar cycles 23 and 24. The periods comprise two...
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Magnetic Helicity with Solar Dynamo
The research on solar dynamo can be said to begin with the discovery of the 11-year cycle from the statistical observation of sunspot activity and to...
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Dynamo models of the solar cycle
This paper reviews recent advances and current debates in modeling the solar cycle as a hydromagnetic dynamo process. Emphasis is placed on...
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Comment on “Tidally Synchronized Solar Dynamo: A Rebuttal” by Nataf (Solar Phys. 297, 107, 2022)
Nataf ( Solar Phys. 297 , 107,
2022 ) has recently asserted that the hypothesis that the solar dynamo may be synchronized by planetary tidal forces is...
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Corotating Interaction Regions during Solar Cycle 24: A Study on Characteristics and Geoeffectiveness
Corotating interaction regions (CIRs) form in the interaction region between the solar-wind high-speed streams and slow streams, leading to...
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Influence of heat interaction modelling on the efficiency of endoreversible closed regenerative solar Brayton cycles
In endoreversible cycles, irreversibility is considered only between the systems and their surroundings. In this paper, the modelling of heat...
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Near-Surface Azimuthal Magnetic Fields and Their Role in Solar Activity Cycles
We consider variations of the azimuthal magnetic fields of the Sun in the 23 – 25 activity cycles according to observations with SDO/HMI, SOHO/MDI,...
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North–south asymmetry in solar activity and Solar Cycle prediction, V: prediction for the north–south asymmetry in the amplitude of Solar Cycle 25
There exists a small but statistically significant north–south asymmetry in most of the solar activity indices and it has important implications on...
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Solar Jets
Various jet-like events observed in the solar atmosphere are described. They vary in size, lifetime, speed, temperature, and ranges of observed...