The Fine Structure of the Quasi-Biennial Oscillations of Sunspot Areas and the Double Magnetic Cycle of the Sun

Solar Physics ◽  
2021 ◽  
Vol 296 (1) ◽  
Author(s):  
Irina Kostyuchenko ◽  
Elena Bruevich
Keyword(s):  
Fine Structure ◽  
The Sun ◽  
Magnetic Cycle

A Clock in the Sun?

2019 ◽  
Vol 15 (S354) ◽  
pp. 127-133
Author(s):  
C. T. Russell ◽  
J. G. Luhmann ◽  
L. K. Jian
Keyword(s):  
Sunspot Number ◽  
Solar Minimum ◽  
Sunspot Cycle ◽  
Solar Dynamo ◽  
The Sun ◽  
Average Period ◽  
Magnetic Cycle ◽  
Number Cycle ◽  
As If

AbstractThe sunspot cycle is quite variable in duration and amplitude, yet in the long term, it seems to return to solar minimum on schedule, as if guided by a clock with an average period of close to 11.05 years for the sunspot number cycle and 22.1 years for the magnetic cycle. This paper provides a brief review of the sunspot number cycle since 1750, discusses some of the processes controlling the solar dynamo, and provides clues that may add to our understanding of what controls the cadence of the solar clock.

Coronal Large-Scale Structure in Odd and Even 11-Year Cycles

1994 ◽  
Vol 144 ◽  
pp. 96
Author(s):  
V. I. Makarov ◽  
V. P. Mikhailutsa ◽  
M. P. Fatianov ◽  
T. V. Stepanova
Keyword(s):  
Large Scale ◽  
Radial Direction ◽  
Solar Magnetic Field ◽  
Essential Difference ◽  
The Sun ◽  
High Latitudes ◽  
Solar Cycles ◽  
Magnetic Cycle ◽  
Solar Magnetic Cycle ◽  
Odd Cycles

AbstractObservations of 22 solar eclipses (1914-1991) have been processed. Radial deviations of streamers in the polar and equatorial zones of the Sun in odd and even solar cycles have been studied. An essential difference of the degree of non-radiality of coronal rays at the same latitudes in odd and even cycles has been found. Deviations from the radial direction of streamers are large in the polar zones in the epoch of the maxima of even cycles and in the equatorial zones at the minima of odd cycles. Deviations from radiality at high latitudes are observed mainly in the poleward direction. The results obtained are interpreted in terms of a new model of the cycle, in which the properties of the solar magnetic field depend on the phase of a 22-year solar magnetic cycle.

Fine Structure on the Sun at 2.8 cm.

1976 ◽  
Author(s):  
C. John Grebenkemper
Keyword(s):  
Fine Structure ◽  
The Sun

scholarly journals Dynamics of the fine structure of the 22-year solar activity magnetic cycle

2019 ◽  
Vol 23 (1) ◽  
Author(s):  
M. M. Koval'chuk ◽  
R. Ye. Rykaluk ◽  
M. I. Stodilka ◽  
O. A. Baran ◽  
M. B. Hirnyak
Keyword(s):  
Fine Structure ◽  
Solar Activity ◽  
Magnetic Cycle

scholarly journals A new imminent grand minimum?

2011 ◽  
Vol 7 (S286) ◽  
pp. 414-417
Author(s):  
Rodolfo G. Cionco ◽  
Rosa H. Compagnucci
Keyword(s):  
Solar System ◽  
Three Dimensional ◽  
Maunder Minimum ◽  
Fundamental Result ◽  
The Sun ◽  
Magnetic Cycle ◽  
Dynamical Parameters ◽  
Dalton Minimum ◽  
Grand Minima

AbstractThe planetary hypothesis of solar cycle is an old idea by which the planetary gravity acting on the Sun might have a non-negligible effect on the solar magnetic cycle. The advance of this hypothesis is based on phenomenological correlations between dynamical parameters of the Sun's movement around the barycenter of the Solar System and sunspots time series. In addition, several authors have proposed, using different methodologies that the first Grand Minima (GM) event of the new millennium is coming or has already begun. We present new fully three dimensional N-body simulations of the solar inertial motion (SIM) around the barycentre of the solar system in order to perform a phenomenological comparison between relevant SIM dynamical parameters and the occurrences of the last GM events (i.e., Maunder and Dalton). Our fundamental result is that the Sun acceleration decomposed in a co-orbital reference system shows a very particular behaviour that is common to Maunder minimum, Dalton minimum and the maximum of cycle 22 (around 1990), before the present prolonged minimum. We discuss our results in terms of a dynamical characterization of GM with relation to Sun dynamics and possible implications for a new GM event.

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