Results 71 to 80 of about 1,036 (175)
Magnetic twist: a source and property of space weather
Journal of Space Weather and Space Climate, 2012 Aim: We present evidence for finite magnetic helicity density in the heliosphere and numerical models thereof, and relate it to the magnetic field properties of the dynamo in the solar convection zone.
Mitra Dhrubaditya +2 more
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The Astrophysical JournalSimilar to the solar cycle, the magnetic cycles of other solar-type stars are also variable. How the variability of the stellar cycle changes with the rotation rate or the dynamo number is valuable information for understanding the stellar dynamo process.
Suyog Garg +2 more
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Journal of Space Weather and Space Climate, 2013 The Sun’s long-term magnetic variability is the primary driver of space climate. This variability is manifested not only in the long-observed and dramatic change of magnetic fields on the solar surface, but also in the changing solar radiative output ...
Tanskanen Eija +4 more
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Discriminating between Babcock–Leighton-type Solar Dynamo Models by Torsional Oscillations
The Astrophysical JournalThe details of the dynamo process in the Sun are an important aspect of research in solar-terrestrial physics and astrophysics. The surface part of the dynamo can be constrained by direct observations, but the subsurface part lacks direct observational ...
Congyi Zhong, Jie Jiang, Zebin Zhang
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Journal of Physics: Conference Series, 2008 Mean-field dynamo models and 3D magnetohydrodynamic (MHD) simulations of global-scale solar convection provide complementary insights into the origins of cyclic magnetic activity in the Sun. One particular class of mean-field dynamo models, known as the Babcock-Leighton Flux-Transport (BL-FT) modeling approach, has enjoyed much success recently in ...
openaire +1 more source
On the Origin of Long-term Modulation in the Sun’s Magnetic Activity Cycle
The Astrophysical Journal LettersOne of the most striking manifestations of orderly behavior emerging out of complex interactions in any astrophysical system is the 11 yr cycle of sunspots.
Chitradeep Saha +2 more
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Solar Field Mapping and Dynamo Behavior
Advances in Astronomy, 2012 We discuss the importance of the Sun’s large-scale magnetic field to the Sun-Planetary environment. This paper narrows its focus down to the motion and evolution of the photospheric large-scale magnetic field which affects many environments throughout ...
Kenneth H. Schatten
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LARGE-SCALE MAGNETIC AND VORTEX STRUCTURES IN A TURBULENT MEDIUM
East European Journal of Physics, 2016 The survey covers a main achievements in the field of dynamo theory. Applications of the model of turbulent convective dynamo to the problem of generation of a large-scale vortexes and magnetic structures in the solar photosphere are discussed ...
V. V. Yanovsky, A. V. Tur, M. I. Kopp
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Tidal Control of Equatorial Vertical E × B Drift Under Solar Minimum Conditions
Geophysical Research LettersObservations show that equatorial ionospheric vertical drifts during solar minimum differ from the climatology between late afternoon and midnight. By analyzing WACCM‐X simulations, which reproduce this solar cycle dependence, we show that the interplay ...
H.‐L. Liu, A. Maute
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Tidal Triggers and the Predictability of Solar Activity
The Astrophysical JournalMagneto–Rossby waves in the solar tachocline are currently considered to be one of the main determinants of solar activity. In particular, they can give rise to the quasi-biennial oscillation (QBO).
Frank Stefani +3 more
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